Watch this before replacing the thermocouple on your ventless fireplace How To Know If Thermocouple Is Bad
3y ago. when the pilot is going out on a water heater its usually the thermocouple if the lights is out you know theres no pilot/bad Testing a thermocouple with Meter If your pilot light won't stay lit, it's probably the thermocouple or thermopile. Replace this and you should correct the issue. If you ...