Check your circuit breaker, and if it's tripped, flip it to the on position. If the gas and electricity supply seem to be functioning well, it could be a sensor issue. Adjust your temperature settings to see if your unit kicks on. Ensure that the thermocouple or thermopile is securely in its proper place.
The most common cause of this problem is a bad thermocouple. This is the ``tube'' that is in contact with the pilot flame and leads back to your thermostat/gas valve. It is relativly inexpensive and can be found at most hardware stores. I suggest taking the old one with you to ensure that you get the correct one.
Use an electric meter on volts DC to test if the thermocouple is bad. you can also try to re-light the pilot and see if it goes on. Thermocouples can be cleaned, but this is only a short fix. The pilot will go out again over time. Thermocouples are not expensive. The best thing to do is just change it.
If the pilot flame ignites but goes out after you release the gas control knob, the cause may be a dirty or defective thermocouple. If the gas is on but the flame will not ignite at all, a pilot tube obstruction is the most likely issue. Remove the pilot tube from the gas valve and spray compressed air to clear it.
Common Gas Fireplace Issues and Repair Options
Relighting is typically inexpensive unless the thermocouple requires replacement, which can range between $120 and $300.
Symptoms Pilot won't light. Pilot lights but burner won't. System lights, but goes out after a while.
How Thermostats Control Gas Fireplaces. A thermostat controls a gas fireplace by monitoring the room temperature and adjusting the fireplace's heat output accordingly. This process typically involves: An IPI (Intermittent Pilot Ignition) module that controls the fireplace's ignition system.
Dead Batteries: The remote control relies on batteries to function properly. Ensure that the batteries are not depleted and replace them if necessary. Faulty Connection: Check the connection between the remote and the fireplace. Make sure there are no loose wires or damaged parts that could interrupt the signal.
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.
One of the most common problems faced by homeowners with gas fireplaces is the pilot light going out or not staying lit. The pilot light is a small flame that ignites the gas burner, which produces the heat for your fireplace — if the pilot light goes out, your fireplace won't work.
There is usually a small reset button somewhere on the thermostat. Finding this button may require that the thermostat panel be removed and pressing this button may require something like a paperclip to push. Hold the reset button down for 5 seconds and the thermostat should reset.
Once you've located the thermocouple, do a visual inspection. You're looking for a few things. The first is signs of contamination on the tube, which can include discoloration, cracks, or pinholes.
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. Blow compressed air into the pilot area, wait a couple of minutes, and then try again to see if this fixes the problem.
Common Signs of a Failing Thermocouple
Here are some common indicators: Difficulty Lighting the Fireplace: If you struggle to light your fireplace, or if it takes several tries to keep the pilot lit, it could suggest that the thermocouple is not sensing the flame correctly and is failing to keep the gas supply open.
Thermocouples are generally skinny and pointed at the top with a copper tube ending in a threaded connector. Thermopiles are generally wider and will have actual wires leading off the body to screw onto terminals. Thermopiles are also interchangeable with other thermopiles.
Professional Furnace Thermocouple Replacement
For those who prefer not to attempt a DIY repair, hiring an HVAC technician is a safer option. The cost for a professional furnace thermocouple replacement usually ranges from $80 to $150, depending on your location and the specific HVAC company.
Also, while both instruments identify radiation, thermopiles operate much more precisely, with a higher degree of sensitivity. Fireplace inserts and Gas fireplaces utilize thermocouples and thermopiles to produce electricity.
Here at Boss Plumbing, we highly recommend you not try to replace the thermocouple on your water heater yourself. Though not a highly complex water heater repair, it nevertheless does involve the use of gas. Thus, if you are unsure about what you are doing, one small mistake could lead to a disaster.
The thermocouple is a safety device designed to shut off the gas valve if the pilot light goes out. Although, if your thermocouple is old, worn, damaged, wrongly positioned, or malfunctioning, it could have wrongly shut off the gas valve and prevented your pilot light from staying lit.