Question about Goodman GMS90703BXA Heater
The ignitor/glow light comes on, the flames/burners light, the glow light goes off and then the burners run for maybe 10-15 seconds and the flames go out. Then the process starts over. What is the most likely trouble spot?
The flame sensor is dirty. You can not see the build up on the sensor but enough build up will change the resistance and the furnace thinks there is no flame.
To clean the sensor, first you need to locate it. it will be a sensor located in the path of one of the flames. Once you locate the sensor, open the bottom panel to turn"off" the furnce. After the panel is removed, unscrew the sensor from the frame above the jets. Use a clean rag and gently wipe the sensor several times. Place back in the cut out and close the lower panel.
The furnace should cycle on and the flame stay on for the normal cycle.
Posted on Jan 18, 2009
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Posted on Jan 02, 2017
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