Any gas appliance with a standing pilot needs a thermocouple to keep the pilot lit, whether it cycles on and off automatically, like a water heater, or you operate it manually, like a gas fireplace.
How much does it cost to replace a thermocouple on a gas fireplace?
How much does it cost to replace a thermocouple on a gas fireplace? If you hire a professional in replacing your thermocouple, you could spend a range of $70-150.
Can I replace thermocouple myself on gas fireplace?
Procedure for Replacing a Thermocouple
The only tool you need to replace a thermocouple is a wrench. Turn off the gas supply to the gas valve. Use the wrench to unscrew the connector that holds the thermocouple to the gas valve, then unhook the probe from its clip and pull out the entire thermocouple assembly.
How do I know if my thermocouple is broken?
If you can’t get the flame to light at all, and you’re sure the gas is on, there’s probably an obstruction in the pilot tube. If the flame lights and goes out when you release the gas control knob after holding it in for the recommended 20 to 30 seconds, that’s the sign of a thermocouple malfunction.
How long does a thermocouple last on a gas fireplace?
Thermocouples can last up to 10 years if properly installed and maintained, while furnaces can last 15-20 years, although either may wear out sooner in multifamily units.
How do you clean a thermocouple on a fireplace?
Turn off the fireplace gas valve and remove the front panel from the fireplace. Use a can of compressed air to gently blow away any dust and dirt from the thermocouple.Wipe away any remaining dirt or soot on the thermocouple with a clean, dry cloth.
How do thermocouples fail?
Changes in temperature can cause regular expansion and contraction in metal, which will cause thermocouples to weaken over time. After enough time, metal fatigue can cause a thermocouple to break.
Does cleaning a thermocouple help?
Remove the thermocouple from the process assembly, using a steel wool or emery cloth, lightly clean the tip removing any build up. Cleaning a thermocouple is not a fix for an issue, such as inaccurate readings.
What causes a gas fireplace not to ignite?
If gas is coming out of the pilot but it still won’t light, the spark igniter could be the problem. You should clear out any debris between the igniter and thermocouple. Blowing compressed air into the pilot area, waiting a couple minutes, then trying again could help to fix the problem.
What causes a gas fireplace not to light?
If gas is coming out of the pilot, but it still won’t light, the spark igniter could be the problem. Alleyne says to look for and clear out any debris between the igniter and thermocouple. 4. The pilot lighting, but not staying lit, indicates that the thermocouple is worn out, Worthen says.
Are thermocouples universal?
Commercial thermocouples are interchangeable, economical, and supplied with standard connectors. Unlike most other temperature measurement devices, external form of excitation is not required for thermocouples because they are self-powered. They are capable of measuring a broad range of temperatures.
How much is a thermocouple?
The No. 1 cause of pilot lights that won’t stay lit is a worn-out thermocouple. It’s easy to replace and a new one costs $5 to $10. Rather than trying to unfasten the thermocouple inside the water heater’s burning chamber, it’s easier to remove the whole burner and thermocouple assembly.
How do you know when you need a new thermocouple?
A working thermocouple will give a reading of between 25 and 30 millimeters. If the reading is less than 25 millimeters, it should be replaced.
Can I bypass a thermocouple?
Realistically, you have just disabled the thermocouple, but you can also reach in and unclip it from its holding bracket where it meets the pilot light. In most cases it will be held on with a gravity clip, but some are held on with a screw that must be removed with a small screwdriver.
Is a thermocouple supposed to be red?
The flame has to envelop the upper 1/2″ to 3/8″ of the thermocouple and the tip should glow a “dull red”. If the flame is adjusted to a sharp flame, it will glow “cherry red” this will cause the tip to be welded and eventually the thermocouple will fail.
