My britony water heater's pilot light kept going out making a very distinct clunking noise as if something was tripping out, I could relight the pilot light and it would stay on but when I tried to turn the gas switch to its normal working position it would shut the gas off. I have now purchased a new gas body for the heater and its still doing the same thing does anybody have any ideas as to what could be causing this problem please.

Mick, February 2010

Hi mine did the same last year and it was the thermocouple ,it doesnt sense the flame and cuts the gas supply

Ian, February 2011