Question about Goodman GMS90703BXA Heater
Getting 1 blink on circuit board..means problem could be gas valve or flame sensor?
Didn't see any cracks in igniter/took flame sensor out and cleaned it..still nothing
Is there a relay that could be out? But, if I turn the fan to ON at the therm. it comes on OK and normal air is blowing thru the vents.
Can you turn the fan ON and then click on the HEAT to get heat?
Please help..down in the 30's.
Bad inducer motor most likely. Check the leads and plug. If it just homms, it is stuck. Check to see if the drain hoses are free of moisture. Can you get to the shaft to spin it to see if it is free?
Posted on Dec 08, 2008
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Posted on Jan 02, 2017
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1. Thermostat calls for heat. 2. Draft inducer motor starts. 3. Pressure switch attached by a small plastic or rubber tube senses the negative pressure produced by the draft inducer and closes. 4. Draft inducer runs for 30 seconds to a minute before you hear a gas hissing sound. The ignitor did not glow, the flame sensor (a small metal probe about 1/8" in diameter, with a white porcelain base) does not sense the flame, so after 8 to 10 seconds the hissing sounds stops with no ignition of gas to heat your home. Your furnace shuts down and goes into a lock out condition until you turn your power switch back off and on again. Then the sequence starts all over again with no ignition of the gas. Solution: You probably need to purchase and install a new ignitor. I would suggest that you inspect your ignitor closely for cracks. Make sure you do not touch the ignitor with your bare hands. If you do not visually see a crack, then you could have a furnace control board problem or a limit, rollout switch problem. Please see "limits, rollout switches & furnace control boards" further down on this page. The furnace's control board might not be supplying the voltage to the ignitor. If your furnace lights and the gas stays on for 8 to 10 seconds, then shuts right back off, then you need to clean your flame sensor with light sand paper or steel wool. You might need a new flame sensor, but most of the time they can be cleaned an will work well after cleaning.
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