Hi, we have a panel heater that just gave up suddenly. We did not use it for the past ten months and then when we used it quite often now, it just stopped heating suddenly.
Basically when I flip the main switch, the first relay inside the timer module clicks/turns on, but then the second relay on another board, which turns on the heater element does not turn on.
I followed the first rule in repairing stuff of course (thou shall check voltages).
First I checked the line voltage, and the 230v was coming in. Then when I checked the output from the timer module, I also read 230v. But when I checked the output of the second relay board, it gave nothing. I also checked the 24VDC that should power the relay but it was only giving 14V.
I disconnected the second board from the panel heater itself and then I made a schematic (image below). I noticed that there was one electrolytic cap and so I thought it might have died because of the heat. I measured that but it was still in spec.
But there was this 220nf (x class cap I think) too. I checked its capacitance and it was only measuring 150nf. Should I replace this thing?..or does it matter if I will not?