I have an American Water Heater ProLine water heater which is about
22-months old. Yesterday, it stopped working and I noticed that the
pilot light was off. So, I lit the pilot according to the instructions
on the tank and turned the heater ON. The burner came on and I left
home thinking my problem was solved. This morning, there was no hot
water again and I went through the same sequence and this time, I
stayed around to notice that the heater is turning itself off
(including the pilot light) in approximately one minute. A few other
- If I leave the gas control knob in Pilot, the pilot light stays on
for ever. I checked after 3 hrs and it was still on. I think this
means that the thermocouple is NOT the problem.
- If I turn the gas control knob to ON and leave the thermostat on
VACATION, the burner never turns on and the pilot light stays on for
- If I turn gas control knob to ON and turn the thermostat hotter until
the burner turns on, the burner runs for about a minute and turns off.
At this point, the pilot light is also off. I noticed that sometimes
the flame turns yellow for a moment or two, especially before the
burner turns off, but mostly the flame is blue and looks normal.
I would appreciate any comments or suggestions on what the problem
could be. Tomorrow in the daylight, I am going to open the inside door
and take a look, but any suggestions on what I should look for would be
welcome. I am proceeding under the assumption that replacing the
thermocouple will not solve my problem because the pilot light is not
going out by itself. Is this thinking correct?