Changing Thermocouple On A Fireplace

If your gas fire isn’t working properly and goes out too often you probably need to change the thermocouple – a small device that shuts down the gas supply if the pilot light goes out.


How to Replace the Thermocouple

  • Turn off the gas and make sure the pilot light goes out.
  • Wait twenty minutes for the thermocouple to cool down.
  • Loosen the screws that hold the thermocouple in place.
  • Pull the thermocouple out with long nosed pliers.
  • Put the thermocouple on a surface that will not burn (just in case).
  • Clean the screw terminals.
  • Insert the two wires of the new thermocouple and tighten the screws.
  • Turn on the gas and re-light the pilot light.
  • Wait a while and then turn on the fire. If you have replaced the thermocouple correctly the fire will light.
  • Thermocouples need to be checked regularly but replacement is the only option for repairs.