DIY manual thermopot pump repair

In detail: do-it-yourself repair of a manual thermo-pot pump from a real master for the site my.housecope.com.

Thermopot is a mixture of a teapot and a thermos. To maintain a certain temperature of the liquid in the device, a heating function is provided. Despite the rather reliable design, the device breaks down over time, and the question arises: is it possible to repair the thermopot with your own hands?

Before you start looking for the reasons that caused the malfunction in the device, it is advisable to know a little about its device. A thermopot consists of a plastic or metal case, inside which there is a metal container for water. The device is closed with a lid with controls.

In any thermo-pot there are 2 heaters: one for boiling water, and the second for maintaining the desired temperature regime. To control the heating of the liquid to a certain value, the device is installed thermostat... The latter is of 2 types.

Stepless - characterized by smooth regulation of the water temperature in the range from 60 to 100 degrees.
Stepwise - the temperature regime is adjusted according to fixed temperature values, for example, as in the VITEK VT-1187 GY thermo-pot, Saturn ST-EK8032, as well as in the MYSTERY MTP-2403 device

Thermopots always have at their disposal several heating control modes. The more modes there are, the more flexible the device can be controlled.

But practice suggests that in most cases 3 modes are enough to control temperature indicators. In inexpensive models such as Magnit RTP-013 and MAGNIT RTP-002, only 1 temperature setting is available, which only allows you to boil water.

Video (click to play).

Also, the thermopot is equipped with an electronic board (control module) and electric pump (pump) for supplying heated water from the container. To supply heated water to the cup, there are several modes: manual filling, auto-filling and filling with a lever on the spout. Such filling functions are available, for example, in the Polaris pwp 4012d or Saturn ST-EK8034 NEW aggregate.

The most common causes of breakdowns are the following parts of the device:

network wire;
control module;
water pump;
electric heaters;
thermal switch.

Before you repair the thermo-pot with your own hands, you should disconnect it from the network. After that, in order to “ring out” the wire of the device with the tester, it must be disconnected. To do this, unscrew the screws on the bottom of the device and remove it. You will see the terminals to which the power cord... Unplug the cord and start “ringing” it with the tester. If the cord is in order, you can proceed with further troubleshooting.

If you find that on your device button does not work or all keys, the cause of the problem may be a failed control unit. It is not recommended to repair it on your own, since it is necessary to have certain knowledge in radio electronics. It will be better if a service center will repair the thermos kettle.

If, after turning on the device, it does not boil water, while all heating modes, as well as automation, are working, then these symptoms indicate that the heater may have burned out or the thermostat has failed.... To find out, you need disassembly of the unit.

Image - DIY hand-held thermopot pump repair

Using a flat object (you can use a screwdriver), remove the plastic ring from the clips. Under it you will see fasteners that need to be unscrewed.

After removing the screws, remove the pallet. To continue disassembling, it is recommended to mark with a marker all the wires of the same color and photograph the location of all other wires. This should be done so that later during assembly there are no difficulties.

Disconnect the hose clamps holding the hoses connected to the pump. You can simply cut them off with scissors or wire cutters.

Disconnect the hoses from the electric pump connections.

Remove the top cover of the thermo pot, without applying great force, turn it upside down and lower the tank so that it is on the table.

Unscrew the PCB and set it aside.

2 more screws can be found under the gasket.

After unscrewing all the screws on the metal pallet, it can be removed together with the bottom.

Next, remove the 8 screws holding the cover.

Now use a screwdriver to pry off the protective cover and remove it. You will see a heating element.

After removing the heating element, it must be checked for open circuit using a tester. If the changes have shown that there is damage to the heater, then it will have to be replaced with a new one, since water does not boil due to this breakdown.

In different models of units, the type of heating elements may differ. Their location may also vary. But the algorithm for disassembling the device, in most cases, is similar. To learn more about how to change the heaters, you can watch the video.

If the thermopot does not pump water when trying to pour hot liquid into the cup, then, most likely, the pump does not work, due to its failure. To get to the pump, you will need to disassemble the device as described above. After removing all parts of the bottom, you will see the pump.

Next, do the following.

To easily remove the pump, disconnect one of the tubing connected to the pump. If the tubes are clogged with limescale, it is recommended to remove and clean them.
Separate the pump from the housing and be careful not to lose the silicone gasket.
After that, unscrew the fasteners connecting the motor to the impeller to the pump housing.
After disconnecting the pump housing and the electric motor, you will notice scale build-upthat interferes with the rotation of the impeller.
Also, if you remove the impeller (it is she who is responsible for the water supply), you can find clogged magnetto be cleaned of dirt.

If, after removing all the contaminants, the pump does not turn on and there is no water supply, then you will need to purchase a new pump, since these signs indicate a burnout of the electric motor winding.

Sometimes a situation arises when the thermo-pot does not turn off and boils water constantly... Or vice versa: you have poured water, the device heats it up, but turns off when the liquid is not boiling yet. Why is this happening? This malfunction can occur when the thermal switches are faulty. They can be found on the bottom and sides of the tank. For better contact with the surface, a special thermal paste is used.

The thermal switch located at the bottom of the tank is attached to it with two screws. Sometimes a manufacturer, especially a Chinese one, applies little thermal paste, because of which the thermostat starts to work incorrectly: the device may not turn off for a long time when boiling water.

To test the thermostat for operability, it is necessary to disconnect it from the tank body, and remove the wires from the terminals. In the normal state (no heating), the relay is in the “on” position. If you check it with a tester, the device will show a resistance of 0 Ohm.

Next, you should connect 2 wires to the switch and immerse it in water brought to a boil. Now measure the resistance again. If the device shows infinity, it means that the switch has tripped and it is functioning normally. If the sensor is not working, then you should purchase a new one and replace it.You can watch the following video about replacing the thermal switch.

Above, some breakdowns of the thermos kettle were considered, which can be completely eliminated without the involvement of a specialist. In other cases, the unit should be taken to a specialized service center for repair. But before you hand over the device for repair, ask how much it will cost you. Most often, from a financial point of view, the repair is not justified, since its cost will be within the price of a new thermo-pot.

A thermo pot has many virtues, however, like a simple kettle, it can sometimes break. In order to repair a thermos kettle with your own hands, you should imagine how it works.

All thermoses-heaters have a similar structure and principle of operation, differing only in additional functions, as well as in the material of manufacture. The working parts of the thermopot are enclosed in a housing, and in order to repair the thermopot, it will have to be removed. Water is poured into a stainless steel tank, in the bottom of which there are two heating elements. One of them produces the main heating to the state of boiling water, and the second only heats the water. There is also a general conclusion. Ceramic protection - "beads" is put on each wire. This eliminates the contact of wires with a metal container.

A cylindrical object can be seen from the side. This is a thermopot engine (water pump) designed to supply water. In different models, the voltage drop across the motor ranges from 8 to 24 volts.

It is impossible not to notice the electronic board on which the circuit (time relay) is mounted, which is responsible for re-boiling. Also, a circuit is needed to convert the voltage for the pump and relay. You can solder the loose contacts on the diagram with your own hands, making their repair in this way.

In addition to the main board, the thermo-pot has a control board. With its help, the buttons for water supply, reheating work, red and LED indicators are connected to it, indicating in what mode the thermopot is.

The thermal switch is of great importance in all heating devices. It is installed in the bottom and on the side of the water tank. In case the thermal switch does not work, a thermal fuse is also provided. This allows you to prevent overheating and damage to the thermal pot if it is turned on empty.

Knowing the location of all the main parts of the thermopot, it is much easier to identify the problem and make repairs. It's even better to study the diagram in order to understand what is connected how, and what parts can be changed. In some cases, the repair does not make sense, and even specialists do not undertake it.

It should be noted right away that it is easiest to remove the upper part of the thermos-heater with your own hands. To disassemble the thermopot, you need to find and unscrew the screws located at the bottom of the device. The housing can then be easily removed. First, you need to visually inspect the board. It happens that a crack is found in the solder, and the soldered element falls off. In this case, you should use a soldering iron to fix everything as it was.

Be sure to inspect the thermal switch located in the bottom. Its condition is checked with an ohmmeter. The working device has practically zero resistance. A non-working part must be replaced with a new one. And then the question becomes where to buy the necessary spare part. Often this can only be done through online stores.

To remove the pump in case of its malfunction, it is necessary to disconnect the supply pipe from it and unscrew the bolts. Sometimes cleaning the impeller and magnet with a regular napkin gives results. In some cases, the repair will no longer help, and you will have to resort to replacing the thermo-pot.

We will analyze what malfunctions a thermopot can have, and how to fix them with our own hands.

The display panel does not turn on and the device does not work at all. In this case, check all wires, all connections, as well as the fuse and thermal regulator.If there are several reasons, then the repair will be more difficult to perform.
Only the reboil button works. The main first boil is not carried out. In this case, check the thermo switch located in the bottom.
The first boiling works, and when boiling again, the thermal pot does not turn on. Inspect the circuit on the main board.
The water can only be heated, the thermopot does not boil. Most likely, the heating element has burned out or the contact has broken.
The water supply function has stopped working. There is a problem with the pump power supply. Quite often, the additional heating coil also burns out, after which voltage is no longer supplied to the motor.

If the coils of the heating elements are burned out, then it is not economically feasible to repair the thermal pot. Firstly, it is difficult to disassemble the tank, and secondly, the cost of insulation and high-resistance wires is quite high.

When the repair is completed, it is necessary to check the electrical safety of the device. For this, it is necessary to measure the resistance between the contacts of the plug and the tank, as well as between the contacts of the plug and the outer casing. The resistance must be endless.

Thermopot is a duet of a thermos and an electric kettle, which is designed to store water at a constant temperature (close to boiling). This is achieved by self-reheating the liquid when it cools below a predetermined level. The process takes place continuously as long as there is liquid in the kettle, or until it is forcibly disconnected from the electrical network. But, like any other electrical appliance, this technique also fails. However, do not get upset and immediately carry it to the service. If the breakdown is not very serious, then it is quite possible to repair the thermopot with your own hands.

Read also: Rack jack DIY repair

The hand pump is a corrugated plastic cylinder. It is listed as an "air pump" in the parts list. This pump works only when the lid of the thermopot is closed, when the flask is a sealed volume. Pressing the large button on the lid compresses the cylinder and forces air into the top of the flask. Excessive pressure displaces a portion of water through the nozzles into the spout. When the manual feed button is released, the elasticity of the cylinder and the pressure in the flask return the manual pump to its original position. The pump is ready for the next cycle.Important! Before you start troubleshooting, you need to take care of your safety.When disassembling the device, disconnect it from the mains, and drain the hot water.Common causes of malfunctions are as follows:

Malfunction of the control system.

Thermo pot pump does not work.

The impeller chamber is dirty.

If the thermo-pot has stopped supplying water, the problem is not necessarily in the pump. Before disassembling the unit, you need to make sure that sufficient voltage is applied to the motor contacts. This can be done with a tester (multimeter). There is another option. The engine contacts are supplied with a constant voltage of 12 volts from another source, for example, a car battery. If the engine starts to rotate, the problem is in the control system, and you need to diagnose it further.If the device does not have a standby heating function, check the status of the rectifier diodes of the power supply.If there is such a function, you need to check the resistance of the standby heating coil, and it could fail (burn out). The engine is powered through it.If the engine itself is in good working order, then you can carry out a small repair of the thermopot pump with your own hands.The reasons for the inoperative hand pump can be the following:

Violation of the integrity of the corrugated plastic cylinder.

Top cover silicone gasket is worn out.

These malfunctions are revealed by external inspection and do not require diagnostic tools and disassembly of the device. But to replace faulty parts, you will have to disassemble the thermo pot cover in the first case, and the thermo pot body in the second case.If the rest of the systems are checked and it is found that the thermo-pot pump is not working, then there will be a big disassembly of the device - the pump is hiding deep in its bowels. After all the parts of the bottom are dismantled, you can see the pump. When the thermopot does not pump the ox, the pump can be repaired by hand.Figure 2 Pump after removing the bottom. Nozzles and contacts are visible (on the right)The sequence of actions for disassembling the assembly is as follows:

Disconnect the inlet and outlet connections. If they are filled with scale, the pump does not pump water well. They should be cleaned, rinsed and blown out.

Unscrew the screws securing the motor housing to the pump chamber.

Figure 3 Beginning of disassembly of the pump

Carefully separate the impeller-pump chamber and the motor housing. In this case, you need to take care of the silicone gasket. If it is worn out or damaged, it must be replaced with a serviceable one.

There may be scale in the chamber that prevents the impeller from turning. It must be carefully removed with a plastic or wooden spatula. The use of sharp metal objects is not recommended as it may damage the camera body.

Figure 4 Scale in the chamber

After dismantling the impeller, a magnet recessed in the chamber body becomes visible, which is also susceptible to scale deposits. It must be cleaned with care. You can do this with a screwdriver, but it is safer to use a plastic or wooden spatula.

Figure 5 Scale hinders the rotation of the impellerFigure 6 Cleaning the magnet from dirt

After descaling the pump parts, carefully reassemble it in the reverse order of disassembly. Particular attention should be paid to the uniform tightening of the screws securing the electric motor to the pump casing and the even laying of the gasket.

After assembly, you need to carry out a test switch-on. If the pump still does not work, it will have to be replaced. The engine is made non-separable and cannot be repaired.What to do if the hand pump does not work? It is much simpler. Actually, it consists of a single part - a corrugated cylinder. If it is worn out and leaky, then it ceases to perform its functions and to pump air into the flask.Figure 7 Dirty hand pumpIn this case, it must be replaced. To replace it, you will have to remove the cover of the terpomot and disassemble it. On some models, the hand pump is pressed against the top cover, which is fastened with several screws. These screws will have to be unscrewed.On other models, the cover holding the hand pump cylinder is latched. They must be squeezed out with a thin screwdriver, being careful. If the latches break, you will have to change the entire cover, and it costs from one and a half to two and a half thousand rubles.Figure 8 Spare part for hand pumpThe hand pump may not pump water in one more case - if the silicone gasket of the thermo pot lid is leaking. In this case, the air blown in by the button flows freely outside, and water is not supplied through the spout. In this case, it will be necessary to replace the gasket. To do this, you will need to disassemble the case. On some models, the gasket can be gently picked up with a spatula or thin screwdriver. On others, you have to remove the flask.Can a thermos boil water by itself? Of course it can, if he is a thermopot. This is a combination of an electric kettle and a thermos. He, like any technique, is prone to breakdowns. Therefore, you need to figure out whether it is possible to repair the thermopot on your own?Thermopot is a smart kettle. The difference is that:

in addition to the water tank, it has an electric pump in its body;

there is a control module;

the flask keeps warm and works like a thermos.

If in an ordinary thermos the hot water gradually cools down, then our unit will keep the set temperature as long as the device is plugged into the outlet. Therefore, all models are equipped with two heaters. One heating element boils water, the second maintains the set temperature. The exception is inexpensive devices that only have a boiling function.

There are models with different thermostats. The device is responsible for the temperature of the liquid. There is a stepless regulator that smoothly raises the heating from 60 to 100 degrees Celsius. And there is a stepped one, which has predefined fixed positions. Many models use only three modes to control temperature readings.A pump is needed to supply hot water from a container to a cup.It has several modes of operation:

auto filling;

manual filling;

spill using a lever on the spout.

The control module is mounted under the cover. The board is responsible for re-boiling using a time relay. And also for lowering the mains voltage for the correct operation of the pump and time relay.Any model has a thermal switch, which is controlled by a thermal fuse. Such protection is needed against overheating and combustion. Parts are attached to the bottom of the device case and the side wall.If you have no knowledge or experience in electronics repair, it is advisable to contact a service center. But it's still nice to have a general idea of how the thermo-pot circuit works. Then it will be possible to eliminate small malfunctions without special education. For example, repair the power cord, evaporate and replace a faulty capacitor, or replace a burned-out heating element or pump yourself.The thermo-pot has a power supply unit. It consists of a pulse transformer and a diode bridge. We do not recommend climbing inside. Even specialists are unlikely to want to do repairs. Most likely, they will insist on a complete replacement. Elements of the electrical circuit connecting electrical parts include: capacitors, resistances, diodes, transistors, etc. They are attached to the electrical board.We have already mentioned the electric pump, control module and thermal protection. They are also included in the scheme. Let's take a look at several repair cases that do not require advanced knowledge.Before trying to repair anything, you need to properly disassemble the unit. This is necessary, firstly, to find and get to the malfunction. Secondly, to properly assemble the device back. Otherwise, the already repaired thermopot will simply not work.Almost all models are designed in the same way. Knowing the general principle, you can visually figure it out yourself. In order not to forget anything and not to confuse anything when dismantling, we will go all the way step by step:What may not work and how to understand the reasons.

None of the indicator lights are on on the display, the kettle does not turn on. We check the power cord and each wire connection. We also check the thermostat, fuse, control module.

No water flows into the cup when the button is pressed. The reason is the pump.

Secondary boiling does not work, the thermos does not heat the water. We check the power supply module of the electrical board.

Basic boil does not work. We check the thermostat.

Heating only works. We check the teng for boiling.

Now in a little more detail - how to check it and what can be done to make everything work again.The power cord must be ringed with a tester. If there is a problem, then the wire is simply replaced with a new one.There are two modules in any thermo-pot. One for power, one for control. We look at the details on the getinax boards, and check the boards themselves for microcracks. Burnt parts are charred and capacitors swell.Parts can be removed and replaced with workers. Solder the cracks with a soldering iron. If the replaced part burns out again, then there is a short circuit somewhere and the whole block will have to be replaced.To check the condition of the heating element, you first need to unsolder it, and then ring it. If it does burn out, then it is difficult to repair the heating element with your own hands. Easier to replace with a new one.It may not pump water due to an elementary blockage.It is not difficult to eliminate such a breakdown by disassembling and cleaning:

Remove the hoses from the pump, disconnect the pump.

Unscrew the impeller from the housing.

Descale the impeller.

Remove the impeller, clean the magnet from dirt.

If, after cleaning, the pump continues to not work, then the winding on the engine may have burned out, then you will have to buy a new pump. When installing the hoses back to the nozzles, secure them securely with clamps to prevent leakage.