My thermostat is not working properly lately. It just doesn't turn the heat back on all the time. I have to manually turn the dial all the way down and then back up, where it's supposed to be and then it works again. Or, to be precise, it works for a couple of hours and then I need to restart it again.
On the inside of the thermostat there is a glass bubble with mercury in it, sitting on top of winded-up spring.
Can anybody help me and tell me how to fix it?
