Connecting wires in an oil heater after repair

Yaropolk asks:

Hello! I'm weak in electrics, so I can't figure it out myself. There was a need to repair the heater. At autopsy, I found a burnt contact. As far as I understand, it is enough to change it.

But here's the problem: in what order should these four wires be inserted back? They were disconnected even before I opened them, so I don't know what to do.

Hello! It depends on which 4 wires and which contact is burnt... You need to check if the heating elements of your heater are in good working order. They can be checked with an ohmmeter (resistance should be low) or with a regular dial (it should beep). In this case, there should be no contacts between the heating element and the heater case. If the heating elements are in good working order and are not punched on the body, then proceed with the assembly. If the heating element is 2, then the wires from them usually come out 4. The heater is inserted into an outlet, at one end there is a plug, and on the other, the wires are connected to the terminal blocks in the heater and there are usually 3 of them - phase, zero and earth (yellow-green).

So two wires from the heating elements are connected directly to zero (one of the pins of the plug), and the second pair of wires from the heating elements is connected to the extreme contacts of the toggle switches, to the middle contacts of the toggle switches a wire from the thermostat is connected (such a thing with a twist - a temperature controller), the phase (the second pin of the plug) is connected to this bimetal, and from it to the other contacts of the toggle switch. In words, it sounds very confusing, so I am attaching a video that can be used to trace the connection of wires and describe the principle of operation of the device.