But the fire just won't kick in. When the amount of oxygen to a pilot light is restricted, it becomes a “lazy” flame and burns yellow instead of blue. The majority of gas furnaces, both natural gas and propane, are fired by an ignitor rather than a pilot light.The ignitor (or igniter) is typically a hot surface ignitor (HSI). Electronic Ignition Gas Furnace Problems Troubleshooting - Gas furnaces are a prevalent form of heat for homes and businesses, and occasionally a gas furnace needs to be repaired because of a problem with the gas furnace. Pilot lights should burn blue . A lockout code will be displayed on the IFC. For instructions on relighting the pilot light, refer to your manufacturer instructions or contact a professional. If the pilot light is out, follow the instructions in your owner’s manual on how to relight it, and then try to relight it. It is the only thing protecting your home from starting on fire if there is a problem with your furnaces airflow. 1) Thermostat. One giveaway that your problem is with your pilot light is if you hear the furnace click on, but it doesn’t fire up. If the pilot light won’t stay lit, a bad thermocouple could be to blame. It is a safety device that shuts off the gas if the pilot light goes out or the electric igniter fails. When a thermocouple burns out or breaks down, the furnace won’t release gas and the pilot light goes out. Light a match to ignite the pilot before you turn on the gas; it will prevent gas buildup. If the burner in your standing-pilot furnace won’t light, try these troubleshooting steps. Do not leave this limit unhooked. Pilot light issues – Check your furnace pilot light and make sure it’s lit. The fan limit switch is a device that prevents the heat exchanger from becoming hot enough to start a fire or getting so hot that it cracks. If your furnace doesn’t stay on, check the pilot light. It essentially ensures that there is a flame at the pilot light before it activates the main gas valve. Having uncovered this ugly truth, I promptly shut off the furnace pilot light, since we were unlikely to need heating any more that year. I'm trying to determine whether the control board has gone bad or if it might be the flame sensor. Sometimes it’s also a matter of spider webs and dust that needs to be cleared away before the thermocouple … House fires endanger everyone in the home and even small fires that are put out quickly often result in thousands of dollars of damage. They also have a pilot light instead of electronic ignition and range … This could be caused by low gas pressure or faulty gas valve. This is only for testing. Be sure your pilot light is lit. If it won’t light, make sure gas is flowing to it — check the gas valve and verify that it’s turned on. Since there are many different types of gas furnaces, it is difficult to cover every single possible gas furnace problem that can occur with a gas furnace … My pilot light was working fine, I installed a new thermocouple last year to fix the pilot light. This thermopile was just what I needed so the wall switch would open the main valve to ignite the main fire. If you have a gas valve that has a PV (pilot valve) and an MV (main valve) then I would think that either you are not getting the 24 volts to the PV since the pilot is not lighting to continue the furnace … Maybe no gas to the pilot. If your furnace does not have a pilot light, move on to the next step. The furnace tries a total of 3 times, then if flame is not established goes into hard lockout. All you need to do is locate the gas supply valve and rotate it in a counterclockwise direction to open it. The furnace will lock out for one hour and then restart. 9. Depending on your furnace, the ideal pilot light may differ slightly. b. Rest assured and know that Aire Serv is here for you, 24 hours a day, 7 days a week, with live dispatchers, prompt service, and no charge for overtime, weekends, and holidays. If the burners fail to ignite, the furnace shuts off the gas supply, goes through a purge cycle and attempts to light the burners again. Natural gas (also called fossil gas; sometimes just gas), is a naturally occurring hydrocarbon gas mixture consisting primarily of methane, but commonly including varying amounts of other higher alkanes, and sometimes a small percentage of carbon dioxide, nitrogen, hydrogen sulfide, or helium. Low-efficiency models use a natural draft for the flow of combustion exhaust. This may be the case if your Goodman furnace won’t ignite, but the light is on continuously. The thermocouple is a gas furnace component located near the pilot light burner. You may also have an issue with your thermocouple or thermopile, which helps detect whether your pilot light … This bypasses the limit and if it is the one that is open the unit should fire up and not give you blink code 33. No.3 When the living room thermostat reaches the required temperature the gas shuts off and the exhaust flue damper closes almost completely, slightly open for the gas pilot lite to exhaust up the … The gas valve opens, and gas flows into the burner ports. If the furnace fires up but then shuts off after a few minutes, it could be that the control board is faulty. In doing so, I found its contribution to be 7.3 Therm/mo, or about $10/mo, and twice as large as that of the (remaining) hot water heater’s pilot. the unit tries to go on but the flame won't kick in. 8. However, a malfunctioning thermocouple may lose the ability to sense heat from the pilot light, causing it to close the gas valve at random. The gas hits the hot surface ignitor, and whoosh, your furnace is firing up. If gas or propane flow to this pilot light is interrupted, even for a moment, the pilot light can go out and will need to be relit. STEP 8: On an older model, you may need to relight the furnace’s pilot light. Make sure your thermostat is set to ‘heat’ and turned up. ... Because various furnace components … Check the Pilot Light. Step 6: If Your Furnace Won’t Turn On, Check Your Pilot Light. Overview of a Furnace Ignitor. The furnace will lock out for one hour and then restart. If the pilot light won't stay lit, the thermocouple may be faulty and should be adjusted or replaced. ... How to Light the Standing Pilot Light on a Gas Furnace Troubleshooting an … It is formed when layers of … after 20-30 attempts the heater will kick in and stay on until it reaches the temperature we set on the … Unfortunately, furnaces need regular professional tune-ups and homeowner upkeep to run strongly and efficiently.. This sounds like your furnace is sparking (clicking) but there is not any ignition to the pilot.