We have a new 20164010RD and the furnace lights and blows heat but the burner will not stay lit. ... the air within the building. The cycle repeats. The control board, as it’s name suggests, regulates the power supply to the parts of the furnace. Set the temp about 5 or so degrees above the current room temperature. The indicator light is slow blinking amber, showing a normal operation with a call for heat. On subsequent tries, the pressure switch may make contact in a slightly different place on the contacts inside, gets good continuity and the furnace turns on. Post Reply. An easy way to test if you don’t have a multi meter is to disconnect the two wires connected to the pressure switch. I have tried replacing the filter, cleaning the flame sensor, securing the pressure switch tube, and checking the connections to the board. I suspect the motor for the circulation blower is somewhat … If you turn your furnace off or the room becomes sufficiently heated to the point where there furnace halts automatically, the limit control switch shuts the blower off to save energy. With Gas turned off -> S8600M -> PV Terminal -> 29V intermittent. Possible causes:` Incorrect flame sensor alignment. Simply turn off the gas leading to your furnace, and then clean the light housing. Common solutions for: My Furnace Starts Then Stops. On March 19, 2018; When you try to turn your furnace on, and nothing happens, you know something is wrong. When I turn the switch off and then on I hear a couple of things: 1) the fan ; and 2) the gas ignition. The fan continues to run even though the flames and pilot light go out. If you discover a gas leak, … The burner ignites but then goes out before heating up your home . The flame sensor monitors the burner to detect whether or not a flame is present. Here are a few of the likely culprits and how to correct them quickly. Then the burners ignite again for a few seconds and extinguish once again. the burner seems to ignite only intermittently. When a furnace turns on and off for very short periods of time, it’s called short cycling. It may be a combination fan/limit control. The furnace safety switch keeps going off from time to time (very sporadic -- approx. OK, no biggie, we will turn it off and suffer in the cold until it gets fixed. There is […] Turn the furnace off and leave the house. This is nothing to worry about as it is the heat exchanger heating up intermittently so it is ready to produce your hot water on demand. Nov 29, 2019 at 9:08 PM #1 #1. It is not normal for a heating cycle to be so fast, and short cycling can cause damage to the furnace. Stop immediately if you smell gas. 11-21-2015, 08:43 PM. If the flame sensor is defective, it might fail to detect a flame. After the burner ignites and the blower starts, the burner shuts off after about 1 minute or so and then re-ignites within 5-10 seconds. If there isn't a flame, the sensor will shut off the gas valve to keep the gas from getting into your house. ... Thermostat: The thermostat monitors the internal temperature inside the RV and will trigger the furnace to turn on if the internal temperature has not … The furnace starts to heat the home, but turns off again quickly after only a short amount of time has passed. Why Your Boiler Fires Up Then Turns Off. High limit switch. Once the heat exchanger overheats, it trips the high limit switch, which shuts the furnace down to protect it. To determine if the flame rollout switch is defective, use a multimeter to test it for continuity. What happens when the furnace kicks on, blows warm air, and then shuts down before the room is heated? You can see the furnace light the pilot and then shut off without lighting the burner. If the board stops working it can cause the unit to run for a short time and then go off. Furnace ignites then stops. If you need to get the heat running in your home as soon as possible, then you need to understand why your Goodman furnace won’t fire up. This furnace is getting older and you are not getting the proper flash code for ignition problems, but, rather rapid blinking. After that, turn power to the furnace back on and go back to the thermostat. We switch the furnace on but after the initial ignition it turns off. However, if the control board is defective, it may not be sending power to the ignition system, which will prevent the furnace from remaining on. When this happens, the furnace will shut off after running for a few minutes. If I then turn the furnace off for a cooling period -then turn it on, it again works normally with the flame on for 15 minutes. 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