Zanussi hob DIY electrical repair

In detail: do-it-yourself zanussi hob electric repair from a real master for the site my.housecope.com.

The high manufacturability of hobs raises doubts about the possibility of repairing them with their own hands from users and home craftsmen. But, like all sophisticated electronic equipment, kitchen surfaces are made up of separate functional units that interact with each other.

Having understood the functionality and interaction of components, having studied the methods for determining common malfunctions, understanding what and thanks to what turns on, you can, without resorting to the services of masters, carry out a simple repair of the hob with your own hands.

All modern hobs work according to the same principle - the user acts on the control sensors, due to which the power relays are switched on, switching high currents in the heating elements.

Therefore, first you need to localize the breakdown, that is, determine the defective node. It is assumed that the cable, connection terminals, fuse, voltage presence is checked, and command set errors are excluded.

Cooking surfaces (panels) are electric heating kitchen appliances (electric stoves) that have glass-ceramic outer cover. Glass-ceramic has great strength, allowing it to withstand a significant weight of dishes, and has good thermal conductivity.

The attractive appearance, which some manufacturers (for example, Hansa) complement with artistic decorations, allows the stylish hob to fit well into the modern kitchen design.

Artistic hob design

Heating elements hidden under the glass-ceramic surface are of several types:

Spiral, working like conventional heating elements;
Corrugated tapes (modified filaments);
Halogen infrared lamps (HaloLight technology);
Induction coils that only heat the cookware material.

Video (click to play).

Various designs of thermoelectric burners

Burners of the first three types convert electric current into heat according to the Joule-Lenz law in the same way as an incandescent filament in a conventional light bulb or a spiral in a conventional electric heating element is heated. The principle of heating using induction is described in detail in the article on induction boilers. Do-it-yourself repair of induction hobs will be discussed below.

Thermoelectric heaters have a heat-releasing corrugation or spiral laid in a heat-resistant material, connection terminals, as well as heating sensors presented in the form of a bimetallic plate located on the line of the radius or diameter of the burner. Expanding, the bimetallic plate acts on the contacts, closing or opening them.

Hob burner device

Depending on the design of the hob, the contacts of the temperature sensor can be power contacts (acting like a thermostat), or signal contacts included in the electronic control circuit. Malfunctioning sensors (thermostats) are a common reason that the hob does not turn on.

In general, repairing hobs differs little from repairing electric stoves, which is described in detail in one of the articles of this resource. The main visual difference is the presence of a glass-ceramic surface and the type of heaters, the spirals of which are visible through the transparent surface. Also a characteristic distinguishing feature is sensory electronic unit and the complete absence of the usual control levers.

Hob touch control unit

Therefore, the greatest difficulty in the repair of electric hobs is the electronic touch control unit, which is also a display. To repair it with your own hands, you will need knowledge in radio engineering and special equipment.

But otherwise, the hob is not much different from an electric stove - the heating elements are switched on by power relays, controlled by an electronic control board, which receives signals from the sensor.

But at first, even without disassembling the hob case, you can determine the malfunction of the touch display and the electronic control unit. As a rule, the receipt of a command from the user is accompanied by a sound signal and is displayed on the display. If there is no reaction to touch, then it becomes clear that there is a breakdown in the sensor.

Indication of a properly working hob

The sensitivity of the sensor may deteriorate due to severe surface contamination. It should be remembered that the entire glass-ceramic surface of the hob requires careful maintenance and cleaning, otherwise cracks may form from the accumulation of scale and burning.

Operation of a stove with cracked glass ceramics will lead to its further destruction and breakdown, therefore, timely care and cleaning of the hobs is needed, as shown in the video:

If cleaning the surface above the sensor does not bring any results, you should disconnect the hob from the mains, first disconnect the line, disassemble the case and remove the electronic board with sensors.

Electronic board with display elements and control sensors

As you can see from the figure, the electronic board of the control unit has many small parts, including microcircuits, so repairing such a module with your own hands requires deep knowledge of radio engineering. If the malfunction of the sensor control unit is reliably established, then it is better to take this board to a specialized repair shop.

If surface diagnostics have not yielded results (the command turns on, but heating does not occur), you should look for a malfunction in the power switching unit. Some models of hobs can independently diagnose some malfunctions, signaling them using the error codes that appear on the display. You should carefully study the user manual and these codes - this will save time when troubleshooting.

Error codes for some hobs

The power control unit (switching) of the hob consists of relay groupscontrolled by an electronic sensor unit. When the operating mode is selected, one or more relays are energized, supplying power to the respective heating elements.

Arrows indicate power relays

Even for a novice master, it will be easy to disassemble the panel case with his own hands in order to independently determine the malfunction of a heating element or power relay. For this purpose, you will need a multimeter and skills to work with it. You will also need to determine the type of heating element itself in order to check it correctly (for example, the resistance of the induction coil is close to zero).

More experienced craftsmen often use a different method - they check the voltage supply to the main nodes, moving from the power terminals through the power relays to the heating elements. The power relay contacts may burn due to frequent switching on, and checking the presence of voltage at the input terminals of the burner will determine if the relay has been activated.

Measuring the supply voltage of a cooking zone

It should be remembered that many elements inside the enclosure carry life-threatening voltages. Working under stress requires focus, mindfulness and sober thinking.

If the terminals of the hotplate are normal supply voltage, you can check the performance of the heating element visually - the filament should be warmed up. But, if the burner turns on, but does not heat up to the required temperature, you need to measure the flowing current. The easiest way to do this without breaking the circuit is with a multimeter equipped with a clamp meter.

The use of a clamp meter to check the current in the power circuits of the hob

Knowing the maximum power of the burner and the supply voltage, you can calculate the rated current according to Ohm's law. In the case of heating elements that work like a heating element, a decrease in the current and heating temperature may be associated with malfunctions in the electronic control unit, thermostatic elements or in the power relays.

If the halogen burner does not heat well, then an internal chemical change in the composition of the gas in the heating element or degeneration of the spiral is possible. In this case, if all other possible malfunctions have been ruled out, the HaloLight Heater should be removed and replaced.

The appearance of the hob burners without glass-ceramic coating

It happens that the burner turns on, but after working for some time, it turns off ahead of time. Improper operation of the heating element may be due to a malfunction temperature sensorinstalled on the hotplate. In order not to change the entire expensive burner, you need to disassemble the sensor with your own hands, clean or bend its contacts, as shown in the video:

To diagnose and repair the hobs, you will have to dismantle the equipment from the countertop, disconnect the power terminals and disassemble the case. It must be remembered that the glass-ceramic coating is vulnerable to point impacts and loads. Therefore, when turning the hob over, avoid small objects falling under the surface so that the weight of the cabinet is not applied to one point.

Mandatory care in the workplace when repairing a hob

It goes without saying that bumps, scratches and carelessness should be avoided. You should carefully examine the hardware fastening mechanisms - these can be bolted connections, screws, or latches. Some elements, for example, an electronic board, can be additionally fixed with glue or adhesive tape. When disassembling a particular model of the hob, you should first study the articles, images, videos available on the Internet.

Experienced craftsmen always check the physical strength of the terminal connections (with the voltage removed) - very often it is poor contact that is the reason that some burner does not turn on. If a faulty burner is detected with a multimeter, or a breakdown in the electronic board is detected, then it can be turned off with one hand alone, without the aid of a soldering iron, and taken to a workshop, where, to replace radioelements or relays, you will need skills in working with a soldering iron and the ability to work with radio components.

You should check the circuits very carefully so as not to confuse anything. In the video above, the author confused the relay, but nothing terrible happened. But, far from always, an error during radio installation can do without consequences, such as a short circuit, burnout of power circuits and failure of radio components.

The peculiarities of the operation of induction heaters can very often be interpreted as a breakdown - the command is given, but the burner does not turn on, there is no characteristic glow, and heating does not occur.The fact is that the metal of the cookware and the coil of the burner form a single oscillatory circuit, due to which high-frequency oscillations arise that induce currents in the metal kitchen utensils.

As mentioned above, the physical processes and the principle of heating using induction are described in detail in the previous article on induction boilers - you should familiarize yourself with this material in order to have an understanding of the operation of such equipment. In the case of hobs, induction heating is used to heat cookware, but the principle remains the same. Image - Zanussi hob DIY electrical repair

The working surface of the induction heater does not burn immediately after switching off

Repairing induction hobs requires an understanding of the high frequency generator and the self-oscillating processes that occur in the electronic circuit. The most susceptible to breakdowns are power switches (transistors), diodes and high-voltage capacitors that are part of the circuit. These transistors are often MOSFETs, and are not called bipolar semiconductors, but they can be detected as faulty.

As shown in the video, technicians in service centers can determine faults in electronic circuits, relying on experience, having available equipment and a large stock of various element base in order to carry out repairs by replacing defective elements. Surface diagnostics of the main components is carried out by the breakdown test method.

The main malfunctions that users of electric hobs may encounter are as follows:

See also - How to connect the hob with your own hands

Although induction panels are the most modern and high-tech devices, they are also not immune to malfunctions. We will analyze the main malfunctions of induction panels, and what repairs you can try to do yourself.

The induction hob does not turn on or turns off immediately - most often this is a feature of this type of panel, and not a malfunction. The induction hob has a protective function, if you use the wrong diameter or material of the cookware, the hob will automatically turn off the power, and the hotplate will not heat up. Also, the hotplate will turn off automatically if you remove the dishes from the surface.
The induction hob heats up for a long time and weakly - again, we read the requirements for the dishes in the instructions. 90% of induction hob malfunctions are associated with the wrong cookware.
The induction hob turns on automaticallyalthough there is no cookware on the hotplate. Remove all metal objects and clean the salt from the stove, if this does not help, you have a problem in the control unit, it needs to be repaired or replaced. Better to contact the service.
The induction hob does not work... The principle of diagnostics and repair does not change, specialists first of all check the fuse. then they ring the entire chain for an open circuit and replace the burnt-out part.

The last type of cooking appliances is a gas surface. One of the simplest and easiest to repair with your own hands. Less electronics are used, so there are not many faults and everything is easily eliminated.

Gas does not ignite or ignites poorly. We immediately check the electric ignition (piezo) for the presence of blockage or liquid. In 90% of cases, it is enough to wash it thoroughly and dry it. If this does not help, we check the presence of electricity in the circuit leading to the piezo coil.
The gas hob does not turn on because gas does not flow to the burner. Repair of hobs in these cases is not needed, prevention is enough. We check the gas pipe, if the valve is open and there is gas in the system, proceed to check the nozzles. The clogging occurs with fat or food debris, it is enough to clean it. Do not forget to wipe dry after cleaning, moisture should not remain. If moisture remains, the piezo will not ignite.

Modern hobs are equipped with sensors for detecting faults and diagnostic modules, an error code appears on the screen. We find the code in the instructions and follow the specified recommendations to eliminate a specific malfunction. Use the forums, there you can find real reviews and experiences on DIY repair from specialists and other users, namely your model with detailed instructions and photos.

If we analyze all the malfunctions of hobs that may occur during operation, we can say with confidence that most of them can be repaired by hand.

Fuse blown
Contact broke
The chain is broken
Cable damage
Clogged stove, nozzles
The heating element broke
Sensor does not work

All these malfunctions are eliminated by hand, if you are faced with a more complex problem and are not sure of your knowledge and strength, contact the service center.

Electric, induction and gas hobs are used for cooking. Each of them has its own advantages and disadvantages, and there are also a number of malfunctions that can be eliminated independently if they occur. Do-it-yourself hob repair can be done subject to certain recommendations and if you have the necessary tools.

Glass ceramic hob BOSCH

Hob repair Bosch, in some cases, you can do it yourself.

If, with the power supply connected, one of the burners does not work or the entire device does not work, we carry out the following work:

We check with a multimeter the voltage in the outlet. If it is, then the problem lies with the hob itself. You can check using the indicator, but it only indicates the presence of voltage. A significant change in the current indicators can lead to the operation of protective mechanisms.
We check the condition of the electrical cord and plug. If there is mechanical damage, it will be enough to replace the cord or plug. You can also check the supplied current on the panel itself, since mechanical damage is not always the cause of a malfunction of the cord and plug.
If the cord with a plug, the socket is in good condition, we dismantle the hob.

Removing the hob

If you repair a glass-ceramic hob with your own hands, you should know that the malfunction of some structural elements can only be detected with a multimeter, by taking measurements in individual sections of the circuit. When considering a Bosh hob, you should pay attention to the following elements:

In the absence of resistance or at low rates, these elements should be replaced.

The work of some structural elements can only be detected with a multimeter.

Another common problem is a broken wire in the hob connection block. Under certain circumstances, they can burn out or, due to poor installation, there may be poor contact. Checking for such a malfunction can be quite simple.

Let's highlight a few more problems that lead to improper operation of the hob:

Some models have fuses that can blow out due to high voltage surges. Their cost is low, the replacement procedure is quite simple. In order to protect expensive equipment from such situations, you should install a surge protection device. If the fuses constantly fail, you should check the operating features of the equipment itself, since the problem may not be in the indicators of the supplied voltage.
The burner may not work due to the fact that the contact on the heating element has disappeared. If the wiring is unsoldered, you can resume work, for which you need to have a soldering iron and be able to use it. The problem may be associated with the power supply, which also often loses contact.

If the heating element is burned out, it must be replaced with a new one

The design of electric hobs is quite complex, but many of its elements are highly reliable.

The principle of operation of an induction hob is to directly heat the contents of the cookware, and not the surface of the stove or the cookware itself. Due to the fact that the hob remains constantly cold, such kitchen appliances are very popular.

There are several problems in which you can repair an induction hob yourself:

If the hob does not turn on or does not turn off immediately, do not panic.Modern models from the manufacturer in question are able to determine the type of cookware, its absence on the hob. Therefore, if the cookware is not suitable for induction heating or if it is not installed, then a protective mechanism is activated. Do not forget that induction cookers do not heat the hob itself.
If the heat is weak, then initially you should check the type of dishes used, whether it fits the recommendations.
Repairing induction hobs, as in the previous case, you need to start by checking the circuit for the presence or absence of contact. Fuses often fail, as there are often power surges in the network. In this case, simply change the fuse.

The rest of the repair of induction hobs is similar to the repair of electrical panels.

Induction hob

To repair the electric and induction hob, you need to have the following tools:

Screwdriver Set. In order to carry out many dismantling work, you need to have several different screwdrivers, which may differ in size and type of tip. In addition to ordinary screwdrivers, you should pay attention to the need for an indicator that detects the presence of voltage.
The mounting knife is often used when carrying out electrical work. As a rule, it is necessary for changing the length, stripping wire strands and other similar work.
Pliers are often used during assembly work. However, they often have a sharp part that can be used to cut the veins.
It is often necessary to have wire cutters.

In addition, a multimeter may be needed to determine the voltage value. It determines various parameters of the supplied current. A soldering iron may be needed when carrying out repair work.

Today, the popularity of household appliances powered by electricity is constantly growing, but minor breakdowns sometimes occur during operation. The electric stove is present in every modern kitchen - it is the heart of this space. When a kitchen assistant fails, many home craftsmen are interested in whether it is possible to repair an electric stove with their own hands?

Firstly, a home craftsman who decides to repair an electric stove on his own must at least understand electrical appliances, know the elementary fundamentals of electrical engineering and safety rules when carrying out this type of work. Secondly, you need to be sure that you can perform such a complex repair, and most importantly, find and eliminate the root cause of the breakdown. Third, it is necessary to prepare special tool.

When dismantling electric stoves, you will need screwdrivers for various purposes: for a cross or slot, with different thicknesses, the so-called tip specialists. You will definitely need keys - open-end and capscrews, pliers, wire cutters. For internal work in the body of the product, a soldering iron, side cutters, an insulating tape and, of course, a special device for measuring voltage and resistance are useful.

The photo shows only an approximate set of the necessary tools - during work, the assortment of the tools used tends to significantly expand.

The electric stove looks very impressive - it is a complex household appliance, but its design is quite simple, and all the main working elements are in a special heat-resistant housingwhich is made of stainless steel.

The principle of operation is similar to all electrical household appliances: the current, passing through heating elements (TEN), heats them to a predetermined temperature. The stove has several burners on the hob, and their number varies: at least two, and the standard is 4.For example, the budget Mechta 15M electric stove has only two burners and a small oven, and the product of Belarusian engineers Hephaestus has a standard set of burners and a voluminous oven.

Burner structure quite varied. Classics are burners on an enameled hob with heating elements inside, modern ones are solid ceramic surfaces with heaters of various types built into them. Let's consider the main types of burners.

Old domestic options are equipped with products cast iron, they slowly heat up and also cool down, creating a steam effect in the kitchen, but they are resistant to moisture and high temperatures.
Tubular spirals - they are made from a hollow tube, when heated, such devices not only give off heat, but also promote the circulation of warm air inside their case, which significantly increases their efficiency. These products are very difficult to repair yourself.
Hotplates ceramic they are very simple in design, they are easy to repair at home - the nichrome spiral is placed in special cells in a circle and fixed. In modern models, glass-ceramic solid plates are increasingly used - they are more durable and easy to clean.
Halogen devices - these are special burners with a similar emitter, which are installed in different places on the hob. A stove with such burners provides quick heating, in a second, and low power consumption, so they are the most economical, but only professional craftsmen can repair them.

All models of modern stoves to transfer current to the burners use power wire special section, in addition, they are connected to regulators and thermostats, ensuring their protection against overheating.

In different models, the heating level is controlled in different ways: by manually changing the cooking mode or by special timers and alarms that control.

During the operation of electric stoves, users may encounter such typical malfunctions.

Sometimes when the product is turned on, burning smell - it is necessary to turn off the stove and inspect the burners, on which the remains of burnt food could remain, which can be easily removed. When there is a smell of burnt plastic or rubber, then you need to call the master.
The heating element does not heat up - here is the fault of the burner or the connecting wires, but first you need to check the controls, maybe the contact has gone away.
Impossible adjust the optimal temperature heating the hotplate - it is necessary to repair the switch.
The hotplate does not heat up - if you have a spiral inside, then it often ruptures from overheating or moisture ingress. In this case, it is very easy to repair the electric stove - replace the spiral, that's the whole repair.
The oven is not working well - it is necessary to ring the heating elements, in 100% it is their fault, replacement is required, since they are not being repaired.

Attention! If the electric stove was connected independently, then not a single service will do repairs for free - you have lost the right to warranty service.

The process of finding equipment failure does not depend on the model of the product and the type of hob or the burners installed on it.

First, using a voltmeter, you need to check the voltage. Do not exclude the possibility of the circuit breaker being triggered, the insulation of the wiring may be broken or the reason lies in the outlet... If so, then it is necessary to disassemble it, and clarify the reason.

If the indicator lights up on the control panel, and the stove does not work, then there is no power supply to the burners, which means that you need to disassemble the stove.

The correct operation of the mechanical or electronic control unit should be checked - measure the current flow to the burner terminals with the device.

Check the heating element of each burner to find a burned-out coil.