boiler

I’m working on connecting the resistor/heating element of my boiler, and I’m using the thermostat shown in the photo below. From what I understand, this is a 4-pin thermostat. I measured continuity with an ohm-meter and found the following: The two terminals on the left have continuity with...

Hi, I have been repairing circuit boards for a few years and a plumber friend has come to me in the hope I can fix a few of the faulty boiler boards he has laying around. He tends to send them to ewaste but I'm sure they're easily fixed. I've searched Google and a few forums but can't seem...