Check the gas regulator. Congratulations! Re-tested everything and ended up with same numbers. My wall switch for my gas fireplace wont work anymore. Gas Stove. Modern style and options in several shapes. Also investigate if the chimney needs cleaning, as this could be an issue. Show Less. Show More. Category: Home Improvement. The burner consists of a set of circuitry with a set level of voltage, a pilot light orifice, and a set of burner jets. Sounds like a thermostat issue, not a thermocouple issue. A word or phrase for people who eat together and share the same food. The pilot light is on and burning, but when I turn the wall switch on no fire ignites. The working theory is that the pilot was essentially being blown out by the oxygen that was being pulled into the unit by the flames. Share this conversation. Rotate the knob that controls the gas to the left, or counterclockwise, until its indicator points to the "PILOT" position. Yesterday I got our gas fireplace insert started up for the first time this season. Straighten the line if necessary. Low gas pressure can also hinder the activity of the spark ignitor. What do I need to do to fix this, or what could it be? It only takes a minute to sign up. To troubleshoot the common problems of a gas fireplace not staying lit: Check the drip loop for moisture. From your gas meter, check the drip loop for excessive moisture. The only thing I changed was that I pulled the unit out a few inches to see better, vacuumed out a bunch of dust/hair/webs, and moved wires around to see around them. Wait 30 seconds before you release the gas control knob. In other cases, dirt build-up may have gotten into the burner jets, and cleaning them may be the solution. Step 2 – If the gas is on, and the pilot hasn’t been lit in several months, try purging the air out of the pilot tubing, To do this, hold the pilot button down for about two minutes while the air bleeds out. If your fireplace has a conventional pilot light: Step 1 – Check the main valve to make sure the gas is turned on. Home Improvement Stack Exchange is a question and answer site for contractors and serious DIYers. I flipped the switch back to off for a second, and then back on, and the same thing happened. One of the biggest problems associated with gas fireplaces is related to the pilot light. I also made sure that the external thermostat setting is high enough. Thanks for contributing an answer to Home Improvement Stack Exchange! This video walks you through the steps from identifying what system you have, to accessing the system and resetting it. Among the causes of problems with gas fireplace burners are: Wiring that is faulty, damaged, or unattached could be the cause of a burner that won’t light. Linear and Contemporary Gas Fireplaces. @Tyson the thermostat wasn't shorting out. ( Heat-N Glo ) The pilot light stays lit- no problem. I opened up the fireplace, and used a wire brush to clean the thermopile as best I could. A layer of grime across the burners cuts off the supply of oxygen necessary for the burners to light. After putting everything back together and re-lighting the pilot, the thermopile voltage was about 610mV, but when I turned the main burner back on, the same thing happened. Keep the logs you love but replace your broken burner. Ever since then, the voltage with the burner off is 550mV. It could be as simple as an issue with the gas regulator that is located at the tank or perhaps a stuck valve. Which is why I called attention to it, Main burner for gas fireplace won't stay lit (pilot light is fine), Gas Fireplace Won't Stay Lit With Fake Logs In Place, Mendota FV44i LP Gas fireplace insert won't stay on, it cycles off after awhile, then on, Fireplace main burner not lighting . To subscribe to this RSS feed, copy and paste this URL into your RSS reader. It needed to be repositioned and sealed to the frame. Share this conversation. They go bad as the voltage they receive is so small from the fireplace. Gas Burner Doesn’t Light in Fireplace. Power Outage. When I flip the switch (which looks like a light switch), it does nothing. @ThreePhaseEel How do I check if the connections are heating up? Based on some threads on the net, I tried short-circuiting the TH and TH-TP terminals on the valve, and the main flame starts and stays on. Pilot light won’t go on. 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