My hot water tank pilot light would go out. I could relight it and the burner would come on and heat up the water tank, but then later on, I would find there was no hot water again and find that the pilot light was off again. It was doing this for a week.
I replaced the thermocouple and all has been working fine for over a month now.
If I could light the pilot light and have it stay on and have the burner heat up the water tank. The thermocouple seems like it worked. I didn't think a thermocouple could be partially broken; I thought it either worked or didn't work.
So can a thermocouple be half broken?
Or is it more likely that replacing it fixed another problem, like a partial blockage in the gas line or something?