The cause of the malfunction of the warm floor can be a break in the heating cable, the failure of the thermostat or the temperature sensor. In all these cases, you can repair the system yourself, the main thing is to determine the failure first. Next, we will tell the readers of "Sam Electrician" how to repair the electric underfloor heating with your own hands!
- How to repair a damaged cable?
- How to repair the thermostat?
- How do I check the temperature sensor?
- How to solve the low voltage problem?
How do I repair a damaged cable?
If the electric floor heating does not turn on or after it is not warming, first of all it is necessary to make sure the heating cable is working. For this, it is necessary to measure the resistance of the cable with a multimeter. Ideally, the value should not differ from the passport value by more than 5%.If you find a significant difference between the nominal and actual resistance, you need to go to the search for the place of chain termination and further repairs. To do this, you can use special devices to search for hidden wiring in the wall. In the place where the electrical circuit is broken, the device immediately reacts.
As soon as the exact fault location is detected, it is necessary to proceed to repair the electric underfloor heating system with your own hands. All you need is to remove the floor covering in the place of breakage, carefully dismantle the area of the concrete screed( if any) and connect the problem zone by pressing a copper sleeve. After that, the place of the cable connection is protected by a shrink tube and the system is checked for operability. 
We recommend that you immediately watch the video of troubleshooting and repair manuals:
How to repair the thermostat?
It may still be such a situation that the electric warm floor does not heat up to the required temperature( set on the regulator).One of the reasons for the failure is the poor contact of the wires in the terminal of the thermostat. Check the screw connections and, if necessary, tighten them, as shown in the photo. Sometimes even a poor contact of the conductors can entail such a simple kind of repair of an electric warm floor that does not work. 
In addition, check the sensor itself to ensure that the temperature controller is faulty by the exclusion method. If all other elements of the circuit are working - just replace the thermostat with a new one.its cost is quite small, and the hassle with repairs can be quite a lot.
We immediately draw your attention to the fact that the temperature regulator can operate and early shut down the system if the temperature sensor is incorrectly installed. If the sensor is located close to the heating cable( or far from it), the temperature reading inside the screed will differ by 2-3 degrees, which will cause a false alarm!
How do I check the temperature sensor?
Checking the temperature sensor also does not represent anything complicated when repairing the electric underfloor heating. To do this again, you need to call the device yourself with a multimeter to make sure that the passport and actual resistance match. If the temperature sensor breaks down, it must be replaced with a new one. If you comply with the recommendations on laying a warm floor under the tile and put the temperature sensor in the corrugation, getting it out from under the screed will be quite easy. Otherwise, if the sensor gets stuck under the floor, it is better not to touch it, but to solve the problem in a simpler way - by installing an air temperature sensor. This device will give a signal to turn on / off the thermostat based on the temperature in the room, and not under the screed, as it was before. 
You can also do without repair by buying a temperature controller with a timer that will be on / off by the setpoint. In addition, there are IR temperature sensors that analyze the heating of the electric warm floor by infrared radiation.
How to solve the low voltage problem?
If you notice that the electric warm floor does not heat well at low voltage or its jumps, then you can get out of the situation by installing a stabilizer for the home network. This device will ensure the normal operation of the heating system, both at low and high voltage. 
That's all I wanted to tell you about how to repair the electric underfloor heating with your own hands. As you can see, all the malfunctions are fairly simple and to solve the problem you do not need special knowledge in the electrician. At the same time, if you are too lazy to repair the system yourself, the master will take at least 5000 rubles( the average cost of installing the coupling on the damaged section of the heating cable) for this.
Also read:
- Surge protection devices in the
- network What tools should the electrician have
- How to use the multimeter
