DIY instantaneous water heater repair atmor

In detail: do-it-yourself repair of an atmor instantaneous water heater from a real master for the site my.housecope.com.

Today, various water heating devices have become a completely natural phenomenon in our homes and apartments. Manufacturers in many countries produce a huge number of all kinds of models of this equipment that satisfy any consumer demand. But when purchasing a water heater or boiler, few think about meeting the requirements for the installation and operation of the device. As a result, this creates serious inconveniences and leads to significant costs in the repair process.

A significant number of manufacturers supply low-cost, low-quality products to the markets. Ambulance water heater breakdown This group does not come as a surprise, since even the minimum warranty obligations for the products are given. However, good-quality products, distinguished by their quality and reliability, may be repaired soon after purchase due to a number of factors that are not at all difficult to avoid.

The main causes of malfunction of the water heater hiding in our everyday life. Hard water and unstable power supplies have a detrimental effect on technology. Various salts are present in large quantities in our water. They are the ones that lead to the formation of scale inside the devices and working circuits. The installation of flow filters at the heater inlet will help to significantly reduce the salt content. In the supply networks of most regions, the voltage and frequency can change significantly in a short period of time. Connection of surge protectors or uninterruptible power supplies will solve the problem.

It is important to install and connect the device correctly. Many breakdowns occur precisely due to mistakes at this stage. Even ignoring the usual grounding can not only lead to electric shock, but will also contribute to the accelerated destruction of the magnesium anode and severe corrosion of all elements inside the tank. The optimum heating temperature is set at 60-70 ° C.

Video (click to play).

Devices of the TERMEKS trademark are highly respected by consumers. It cannot be argued about their complete identity with other brands, but the construction and principle of operation of the units are very similar. Also, the designs of flow-through and storage heaters are the same, the former differ only in a more powerful heating element, the latter have a large tank. Therefore, having analyzed the main reasons for the breakdown of the Termeks water heater, it will be much easier to repair any other model yourself.

The most problematic part of a water heating device is its internal capacity. It is made of stainless steel or coated with titanium enamel. Stainless steel serves for 10 or more years, the enamel deteriorates twice as early. Tank leaking is often fatal to further use of the heater. In most cases causes of malfunction of the water heater and its leaks lie in the corrosion of the bulb. Manufacturers protect it by spraying various compounds and installing a magnesium anode, but this rarely saves. Sometimes it is possible to weld the container with argon, otherwise it is impossible to repair the unit. Therefore, timely replacement of the magnesium anode and annual descaling of the tank is so important.

There are various malfunctions of water heaters, which are identified and eliminated on their own:

When turning on the device knocks out the RCD... Possible incorrect connection of the heating element (check), incorrect connection of the equipment to the power supply (check) or failure of the machine (replace).
The water heater does not heat water. The thermostat (check, replace) or heating element (check, replace) could be out of order or poorly connected. The device is not well connected to the mains (check).

Leaking from under the flange. The gasket was worn out or damaged (remove and look for a similar one - it is better not China), the flange itself is rusted and leaks (replace).
Temperature not regulated, heater overheats (boils) and turns off... It talks about the failure of the thermostat (check the thermal paste under it and the device itself, replace it) or incorrect connection of the device (check).
The device does not heat up at all or too heats the water slowly... Happens due to breakdowns thermostat water heater (replace), excessively scaled or burned-out heating element (clean, replace), failure of the control and monitoring unit (call the master, replace).

Water heater housing electrocuted... The heating element is covered with scale, cracked and the water contacts the coil (replace) or the control and monitoring unit (replace) is out of order. The device is not grounded (ground).
Unit does not turn on... The thermostat does not work (replace), the heating element has shorted or burned out (replace), the control board is out of order (replace), the mains power is not supplied (check).
The device hisses, heats up for a long time, makes extraneous sounds. The phenomenon is observed when installing pipes that are too narrow (replace with wider ones). If the heater is used for a long time without preventive measures (clean it).

There are others malfunctions of electric water heatersspecific to certain models. Ways to eliminate any of them can be found on the Internet upon request.

The main causes of boiler breakdown the same ones that disable water heaters (scale), although in these devices an important role is played by the fittings of devices: pipes, connections, taps, valves, valves, pumps. Here, the inner areas of the tanks are also prone to the formation of deposits, but most of them accumulate on the inner and outer surfaces of the coils (depending on what acts as a coolant). Frequent enough boiler breakdown - failure of its conductive tubes. Their welding is possible only with argon, but to carry out such a repair, you will have to remove the coil from the tank, and then hoist it back. Repair on your own is almost impossible here and contacting the service is inevitable.

An electric boiler is an effective solution to the problem of hot water supply for a private house. Such equipment, however, like any other, breaks down periodically.

If serious breakdowns have to be eliminated in a service center, then any more or less experienced craftsman can perform a small repair of the water heater with his own hands.

To minimize problems with the device, you should study its design and principles of operation. Usually, in private households, not flow-through, but storage models are used, which make it possible to use electricity more efficiently. Such a device consists of a heat exchanger tank, inside which a heating element is installed - a heating element, connected to the power supply.

An important part of the device is the thermostat. This element allows you to maintain a constant water temperature inside the storage tank. The water is piped to the heat exchanger. If its temperature is too low (and this is usually the case), then the thermostat gives a signal and turns on the heating element.

The water is heated until it reaches the required temperature. After that, the thermostat works again and turns off the heating element. Hot water is taken from the tank and replaced with cold water, the heating process is repeated over and over.This is a general diagram of the device and operation of a conventional storage water heater.

Flow models are arranged somewhat differently. They do not heat a static volume of water, but a stream. They use more powerful heating elements that start working when the water is turned on and stop when it is turned off. To study in more detail the operation and structure of a particular model, you need to carefully familiarize yourself with the accompanying technical documentation.

The heater tank is a sturdy stainless steel container, one or two millimeters thick. No matter how resistant this material is to corrosion, nevertheless, these processes periodically arise and develop, which leads to the flow of water from the device. One of the most common causes of such breakdowns is electrical corrosion.

To prevent it, you need to regularly, i.e. Replace the internally mounted magnesium anode annually. This element is specifically designed to prevent electrical corrosion. Over time, it wears out, and the owners of storage tanks lose sight of replacing this important part.

As a result, the tank, which has served well for some time, suddenly starts to leak. The incorrect state of the magnesium anode can also affect the state of the heating element. The outside of the storage tank is usually enclosed in a metal or plastic housing, and it also has a heat-insulating shell that prevents heat loss.

Damage to the outer shell and insulation is rare, usually due to careless handling of the device. Cracks and chips on the body of the water heater may not interfere with its operation, but this will lead to a deterioration in the properties of the heat insulator, and will negatively affect the functioning of the device as a whole.

Cold water inlet and outlet pipes - for hot water usually do not cause any problems if the installation of the heater is done correctly. Usually, a water heater is equipped with two thermostats, one of which is designed to control the water temperature, and the second monitors the state of the first device.

Sometimes a third thermostat is also used, which determines the good condition of the heating element. In any case, the broken thermostat will have to be completely replaced. There are capillary, rod and electronic types of thermostats. Their design is different, but the principle of their work is the same.

The insulating gasket not only serves to seal the connection between the elements of the water heater, it is also necessary as an electrical insulator. It is recommended to replace this element regularly at every maintenance of the water heater.

The thermostat shows exactly what temperature the water inside the device is heated to. If this element breaks down, the water heater will still perform its functions, although data on the degree of heating will not be received.

Breakdown of heating elements is a typical problem for both flowing and storage water heaters. This element works under high stress and therefore wears out quickly. If the power supply is connected, but the water in the tank does not heat up, most likely the problem has arisen with the heating element.

First, you should check if electricity is supplied to the heating element and the thermostat. In the places where the cable is connected, the presence of voltage is checked with a tester. If there is no voltage, you may need to replace the cable itself or check for a power outage throughout the house.

If there is electricity and the cable is working properly, then problems have arisen with the heating element, which will have to be replaced, or with the thermostat. To figure out what exactly broke, you need to remove the thermostat and check it with a tester. Testing the health of the heating element is carried out as follows. First, the measuring scale of the device is set to the interval of 220-250 V. Then the resistance is measured at the terminals connecting the heating element to the mains.

If there is voltage, disconnect the heating element from the network and check the potential at the terminals of the heating element. Lack of response from the tester will indicate that the device is defective. If there is a reaction, you need to continue the diagnosis. First, disconnect the water heater from the power supply. Then the heating element is disconnected from the thermostat so that the contacts of the heating element remain not isolated.

Tester contacts are applied to them and the reaction is monitored. If it is, the heating element is working, if not, it needs to be replaced. In this case, it does not matter what kind of numbers the tester produces, only the presence or absence of a reaction is important. These troubleshooting methods are suitable for both storage electric water heaters and flow-through models.

To check the serviceability of the thermostat removed from the water heater, you need to set the adjustment knob to maximum and measure at the inlet and outlet of the device. If the needle of the tester remains calm, i.e. its position does not change, which means that the thermostat is faulty and needs to be replaced.

If the arrow deviates, then you need to continue testing. Now you should set the minimum position on the thermostat and attach the test leads of the tester to the contacts. It will not be easy to continue the diagnosis alone, the probes will have to be fixed or asked someone to hold them in the correct position for a while.

After that, you need to take a lighter and heat the tip of the temperature sensor. If the thermal relay is triggered, the circuit will open, and the resistance on the tester's scale will sharply go down, then the thermal relay can also be considered serviceable. If the system does not respond to heating, then this element is damaged and needs to be completely replaced.

Occasionally, the water heater can stop working due to a blown thermal fuse as a result of dangerous overheating of the device. It is enough to correctly adjust the operation of the device for it to start working as usual.

If the check showed that both the heating element and the thermostat are in good order, most likely problems have arisen with the control board. It is almost impossible to repair such an element at home. It will have to be replaced with a new one, and you will have to use the help of a specialist who will help you set up the electronic equipment. Most often, you just need to contact the service center, where the required element will be selected and installed correctly.

A tank leak is a serious problem that cannot always be corrected on your own. In some models, either the tank or the entire heater will need to be replaced. Sometimes the leak can be sealed, but care must be taken to restore the integrity of the outer casing and the thermal insulation layer. Usually such measures are insufficient and short-lived, and soon the leak will reoccur.

The water heater tank most often leaks if:

damage to the internal tank has occurred;
the heating element has deteriorated;
leaky gasket.

If water flows at the place where the heating element is attached, it may not be necessary to repair the tank itself. A special gasket is installed in this place, the leak can be caused by its damage. The gasket is replaced and thus the problem is solved.

A water heater tank leak usually occurs due to neglect or untimely maintenance, which also includes the replacement of the magnesium anode. Another common problem is lack of grounding. This can also lead to the development of corrosive processes and the occurrence of leaks.

If you need to replace the gasket or heating element, it is best to first dismantle the faulty element in order to take it with you and find an exact analogue. Obtaining parts by eye can result in unnecessary costs. This replacement is relatively straightforward.But if problems arise with the tank, you will at least have to contact the service center. Immediately it is necessary to find documents for the water heater and clarify the warranty periods and service conditions.

Regardless of the nature of the breakdown, before starting repair work, you first need to turn off the power supply, remove the protective cover, disconnect the wires, pipes and drain the water. Wall-mounted models are usually removed from the brackets. The protective cover that hides the place for connecting the electrical wires and the fastening of the heating elements may have a different position depending on the model.

On horizontal devices, such an element is usually located on the left, on vertical heaters - at the bottom, and on small models - in front. On some devices, you first need to unscrew the main mounting bolt located in the center. Sometimes this element is hidden under a decorative sticker.

After that, you need to carefully remove the thermostat, and then remove the tubes of the temperature sensor. They must be handled with great care. If the integrity of the thermosensor tube is broken, liquid filler will leak out. As a result, the water heater will simply have to be thrown away and a new device bought.

If there are stickers on the body with the serial number indicated, they must be kept, even if it interferes with the maintenance and repair of the product. This can affect the manufacturer's fulfillment of the warranty obligations, as well as facilitate the work of the service center employees.

The fact that there are problems in the operation of the device may indicate some changes in the mode of its operation. For instance:

increasing the time for heating water to a predetermined temperature;
the appearance of unusual sounds accompanying the operation of the device;
the appearance of impurities in tap water, a change in its color, smell or taste.

If at least one of these signs is observed, the water heater should be cleaned immediately. To do this, you will have to perform the following operations:

Disconnect the device from the power supply.
Remove the protective cover.
Disconnect the contacts of the electric wires.
Shut off cold water supply.
Remove residual water from the tank using a hose.
Unscrew the screws that hold the heating element.
Remove the heating element and descale it.
Clean the inside of the drive from dirt and scale particles.
Rinse the device thoroughly.
Check the health of the magnesium anode.
If necessary, replace this element immediately.
Wait until the cleaned tank is completely dry.
Install the heating element in place.
Reassemble the device.
Check the tightness of all fasteners.
Connect the water heater to the power supply.
Check for grounding.

The heating element should be removed from the tank carefully, the bolts may be too stubborn, sometimes the heating element is difficult to remove due to too much scale layer. The heating element is cleaned by mechanical or chemical means, as is the removal of contaminants from the tank. If a large amount of scale is found inside the device, you should consider revising the operating mode of the water heater.

This phenomenon is often observed when the device has been operating at maximum power for a long time. It is recommended to set the maximum heating temperature not higher than 60 degrees in order to increase the life of the device and reduce the number of breakdowns. If the body of the heating device shocks, it is possible that the heating element is deformed and ruptured, or there are breakdowns in the control system.

A detailed video on diagnostics of the condition, maintenance and self-repair of domestic water heaters can be viewed here:

It is not so difficult to repair a water heater when it comes to replacing some of its elements. In the event of a serious breakdown, it would be wiser to contact a specialized service center.Correct use of the device and its timely maintenance will save you many problems and costs.

It is difficult to imagine comfortable living conditions without hot water supply. Nevertheless, you will hardly surprise anyone with systematic interruptions in the supply of hot water on schedule or without a schedule. Tired of enduring the temporary lack of hot water in a city apartment, doing without a warm shower in your country house, or just wanting to improve your life in a private house? All these problems are solved by an elementary installation of a flow pipe or a boiler. One provides an uninterrupted supply of water when needed, and the other, solving a similar problem, will also help to save on paying electricity bills.

Currently, there are a huge number of brands engaged in the production of instantaneous water heaters. The Israeli brand Atmor enjoys a good reputation. The instantaneous water heater produced by this company has good performance indicators, is convenient and safe to use. Features of Atmor water heating equipment, installation instructions, DIY repairs and customer reviews - read about all this below.

When you need to buy large household appliances, you always want the choice to be right. It is for this reason that one should carefully study the performance characteristics of the offered products.

As for the choice of heaters, here you should first of all pay attention to the power of the device, which affects the pressure force, the number of serviced parsing points, and the installation option. The best option is a 5000 W device. If a storage water heater is required, then the tank capacity is added to these parameters.

Read also: DIY pantry repair

It is equally important to understand the difference in the principle of operation of both types of water heating devices. Instant heating of a cold stream with flowing equipment is carried out by equipping such devices with heating elements. When the heating element is turned on, it starts to heat up. As a result of water jets hitting the heating element, they almost instantly warm up to the temperature parameters set by the user.

That is, as soon as you open the tap, you can already start using hot water. Without using a special tank, like in boilers, where within an hour or two the water will gradually warm up to the desired temperature, it is not necessary in principle to wait for the "readiness" of water with a running water heater.

VIDEO: Electric water heater ATMOR Basic

The advantages of Atmor flow-through devices, which are distinguished by a well-thought-out design solution, can also be safely attributed to the following:

Compact dimensions of the equipment - due to their small size, the devices do not require much space, plus they are quite lightweight.

They work properly even with prolonged interaction with poor quality water.

Equipping with special tubular heating elements up to 12,000 W provides a high speed of water heating.

Quality materials and workmanship.

A protective mechanism is provided to automatically shut off the water flow in case of overheating over 50 ° C. A thermal fuse helps prevent heat burns.

Electricity consumption occurs only when water is used directly.

The new models of water heaters have a display and a function of smooth adjustment of the heating temperature.

Long-term operation - subject to the manufacturer's recommendations, the Atmor water heater will delight you with uninterrupted operation for 10 years or even more.

Instantaneous water heaters Atmor (Israel)As for the disadvantages of Atmor water heating equipment, the following points can be highlighted:

Difficulties often arise when replacing a non-standard shower hose.

To connect the heater, a separate line must be drawn from the electrical panel. Although this requirement applies to the use of any instantaneous water heaters, regardless of the manufacturer.

The supplied mounting templates are far from always suitable, so the easiest way is to calculate by yourself where the holes for the fasteners will be located.

The wide range of products of the Israeli brand allows you to choose a compact device that will become a reliable assistant in the height of the summer season or more powerful for organizing hot water supply in homes with permanent residence.The model range of Atmor water heaters is represented by several series of flow-through and storage-type water heating devices:Storage heaters with a capacity of up to 30 liters. Indicators of power consumption are 1500 W, and the maximum heating temperature is 85 ° C.Allows you to choose a flowing electric heater that complements the shower. The popularity of the BASIC models is due to the affordable price of 2200 rubles.Atmor Platinum 5 kW (Crane)Universal grooves. Platinum models are equally suitable for seasonal and permanent use both in summer and winter.Heater models ideal for outdoor showers or kitchens. The maximum heating temperature is 65 ° C, the rated power is 3500 W. The set of devices includes a faucet nozzle and a shower head.Atmor Blue Wave 405 ThermostaticWater heaters of different power 5 kW, 7 kW with a productivity of 3 and 4 liters of water per minute, respectively.ATMOR Aquaplus Supreme 5 kW ShowerUniversal heaters with a power of 5000 watts.This is an opportunity to choose a flow-through water heater with a capacity of 5 kW, 7 kW and 12 kW, where a water discharge system through a flow-through valve is provided. In addition, such models are integrated into the general water supply system, and the resulting water can be distributed among several points of analysis.A series of models with a water gradual changeover mechanism. Any Optima model will cope with the task of supplying hot water for household needs.The official website of the Atmor manufacturer contains detailed information on each model range, so when planning to buy a water heater, do not forget to study the technical characteristics of the models and compare prices from official dealers.The compactness and low weight of Atmor devices greatly simplifies the task of their installation. It is enough to choose any free and convenient corner in the kitchen or bathroom, and you can immediately start installation. Although, in some cases, it will not be possible to install a water heater, even following the instructions, for a number of reasons.Flow-through units have increased requirements for the parameters of the electrical network, which implies the need for an appropriate powerful, three-phase electrical wiring. Moreover, the electricity meter must withstand a load of over 40 amperes, otherwise it will need to be replaced. The same situation is with old pipes or the lack of appropriate connectors on them. That is, it may also be necessary to modernize existing communications.If such issues do not have to be solved, then other difficulties should not arise. So, the installation of a water heater includes:

The choice of the optimal place where the structure will be located, so that it is not only convenient to use the heater, but also provides easy access to all points of the water intake.

Layout of the unit fastening diagram. If the walls are concrete, it is best to use a hammer drill to drill holes of the required diameter.

Connecting the water inlet / outlet.

Power supply connection. First you need to make sure that there are no leaks in the system.

Done: after 15-20 seconds you can enjoy hot water.

There are two options for connecting a water heater. Temporary use of a water heater involves the supply of cold water.A shut-off valve and a flexible hose are installed on the corresponding pipe, which is connected to the water heater. With a permanent connection, in a cold and hot pipe, it cuts through a tee with a shut-off valve. After that, both tees will remain connected to the corresponding holes of the equipment, and connect the tap and the water outlet with a hose.In the absence of self-confidence, it is better to seek help from specialists. In addition, if the Atmor water heater is installed by professionals, warranty maintenance will be a bonus.VIDEO: How to connect an atmor instantaneous water heater

In the first part of the article on the repair of instantaneous water heaters, the principle of operation of this household equipment was given, so that it would be easier for a novice master to understand the essence of the problems that arise.

In this continuation of the article, it will be described in more detail about the protection elements and an algorithm for troubleshooting in instantaneous water heaters will be given.

There will also be shown videos recorded by home craftsmen in the process of repairing their instantaneous water heaters.

If the flow sensor is damaged and it is jammed in the on position, then when the tap is closed, the water in this small heating zone is very overheats quicklywhich could damage the heater itself due to the increase in pressure. Also, due to the lack of cooling, the heating elements will overheat. To prevent this from happening, temperature control sensors must be present in instantaneous water heaters.

Water flow sensor for KISPEL water heater

In the model considered in the previous article, the sensors T1 and T2 are made in the form of one element, although their purpose is different. The temperature sensor T1 is set to operate when the temperature exceeds 60 ° C, it interrupts the circuit. After cooling, T1 returns to the operating position again. Exceeding the temperature in this case is possible for a number of reasons not related to a breakdown in the water heater.

Thermal sensors T1 and T2 are combined in one device, indicated as an overheating sensor

Thermal sensor T2 is set to a temperature of 90 ° C - one might say - this is the extreme line of protection. It will work in the event of a breakdown of the flow sensor and temperature sensor T1. Such a breakdown will not be eliminated by itself, therefore, this protective device after triggering is necessary enable manually after the repair of the water heater. For water heaters with a digital interface, breakdowns or incorrect sensor readings will be displayed as a highlighted error code on the display. An example of how to eliminate one of the errors is shown in the video below, which also describes the function of thermal fuses and the repair of the electronic unit of one of the models of the Termeks water heater:

Depending on the model and design of the water heater, the control system for its operation can be performed in different ways. For example, in the THERMEX STREAM model, the temperature is controlled by water flow control. Myself flow is regulated special shower or washbasin heads supplied. In this case, the protection components are a pressure switch and a thermal fuse (temperature sensor). Image - DIY instantaneous water heater repair atmor

Disassembled THERMEX STREAM flow heater

Accordingly, the electrical schematic diagram of this water heater differs significantly from the above wiring diagram - here the phase current sequentially passes through the pressure switch and the thermal fuse, which returns to the on position after the temperature drops. Before self-repairing the water heater, be sure to study the electrical diagram and instructions from the manufacturer.

An example of a circuit of instantaneous water heaters THERMEX STREAM

As can be seen from a comparison of two schemes from one manufacturer, the principle of control and protection in these models of water heaters is significantly different. Water heaters have a completely different design, respectively, and the scheme will be different. Below, for example, an electrical diagram of the Atmor water heater is shown.

Diagram of instantaneous water heater ATMOR, power 7 kW

Also, some models may have an electronic interface directly connected to the power relays for controlling the power supply of heating elements. This means that a breakdown in this electronic board, or a failure of the algorithm can lead to the stoppage of the water heater. Some instantaneous water heaters can have temperature control, which is achieved by switching heating elements, or using an electronic circuit.

Above, as an example, several electrical circuits of instantaneous water heaters are given, where the common components are heating elements and protective sensors. A careful study of the design and diagram of an existing faulty water heater will help you understand the principle of operation and build a troubleshooting algorithm for yourself. Will also be very helpful information from the masters, who carried out such repairs, therefore, you need to look for information on the forums and be patient, waiting for an answer to your question. You can also find helpful repair videos.

A lime-clogged shower head that has caused the water heater to malfunction can be cleaned with a cellophane bag with vinegar

For example, as mentioned above, the pressure (water flow) is often controlled by spout nozzles, which can become clogged due to sediment build-up from poor quality water. Often, the solution to the problem with an instantaneous water heater can be in cleaning the hose or nozzle, as well as in bringing the inlet pressure of the water supply to normal parameters. Indeed, if the inlet pressure is below 0.05 MPa, then the sensors will not allow the heating elements to turn on. The same can be said about the correspondence of the electrical parameters, which are also given in the table below.

Operating parameters of instantaneous water heaters Termeks Stream

If the failure of an instantaneous water heater is accompanied by the operation of an RCD that protects this power line, then the breakdown is obvious - a breakdown of the heating element to the case. In this case, a great success for the master will be a short circuit to the case in some other node - for example, a wire that has fallen off (burnt out) from the terminal. To check the heating element for breakdown, switch the multimeter to the megaohm measurement mode - the ideal resistance is infinity. Considering the conditions of using the water heater, which are critical for human health, the leakage resistance in the heating element below Megaohm can be potentially dangerous.

Even without disassembling the water heater, it is possible to carry out its preliminary diagnostics by changing the operation of the equipment, paying attention to the noise and light indication

For example, you can check the health of the flow control system by clicking on the power relays for turning on the heating element. In this case, there is often burnout of the terminals and poor contact on them, or the failure of the heating elements themselves. If you have a tester or even a homemade probe, it will not be difficult to ring the active coil of the heating element. The dialing of various conductors has been said many times on other pages of this resource. Depending on the power of the heating element, its resistance will be within units - tens of Ohms.

Calling the heating element of the water heater

After making sure that the heating element is in good working order and having checked the reliability of the contacts, you should test the relay itself - the operation of its magnetic system and a click does not guarantee the serviceability of this unit. The pads inside the relay are subject to burnout and wear. Therefore, ring the pairs of contacts of the power relay. If a lack of conductivity is detected in a closed pair of contacts, the relay must be replaced.

Instantaneous water heater power relay

Many craftsmen successfully disassemble even non-separable relay structures if they cannot find a replacement. Here is a repair advice - to find out as much as possible about the design of this relay, the sequence and the possibility of disassembling it in order to get to the switching contacts in order to be able to clean them, bend them, fix them - in a word - eliminate the problem of the missing contact.

Water flows - but does not heat up with a working relay and heating elements - which means that the liquid flow sensor itself is faulty.As mentioned above, you can check the water flow sensor with a powerful magnet, bringing it close to this component. If the suspicion is confirmed, the faulty sensor must be replaced.

Water flow sensor, often used in various models of instantaneous water heaters

The serviceability of thermal fuses and pressure sensors (pressure switches) when the pressure parameters match, you can check them with a tester. By temporarily bypassing their leads with a wire, you can make sure that the problem was in them. You should never leave the shunt to work on a permanent basis - because in this case the equipment will be deprived of protection, which can lead to very disastrous consequences - defective protective components must be replaced.

Many owners of instantaneous water heaters complain about the poor-quality assembly of their products. The most common problem is the inconsistency of the wires and terminals with the load currents flowing in them. Very often, unscrupulous manufacturers of instantaneous water heaters install cheap and low-quality components, and also save on wires and terminals.Burnt and melted terminals cause loss of contactIf, before the breakdown, during the operation of the instantaneous water heater, a characteristic smell of insulation melting was noticed, then the cause of the malfunction may well be loss of contact or even burning off a wire that is too thin. Replacing the contact terminals and wires with better and more reliable substitutes can eliminate this problem.