How To Replace A Thermocouple On A Gas Hot Water Heater
If your gas hot water heater won't heat or stay lit, the thermocouple may need replacing. The thermocouple is a safety device that cuts off gas from the water heater in case the pilot goes out. The sensor helps it detect when the pilot light is out. When the thermocouple malfunctions, it will transmit incorrect signals to the gas valve which the gas valve misinterprets as the pilot light is out.