Question about Goodman GDS80904BNA Open Flame Heater
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Posted on Jan 02, 2017
I turn on the heat on the thermostat and the unit won't stay on. The gas would ignite but the flame would immediately go out. That will continue throughout the day. Sometimes it will heat up the house, but a majority of the time it don't.
Posted on Dec 07, 2009
The problem you have is water in the exhaust pipe.
Check to see if the pipe has sagged anywhere or if there is a trap in the line.
If you hear gurgling then it is definetly water....
Some times can be hard to find, even a pipe 1/4 full will cause problems. They are very sensitive to flue problems.
Make sure that the flue pipe either runs back to the furnace or out to the outside, a continuos slope either way witha high spot in the middle.
Also check the bottom drain of the blower if it has one, have had them plug and trap water also..
I hope that this will help you to solve your problem!
Thanks for using Fixya!!
Posted on Dec 24, 2009
SOURCE: i have a gmh8 ---the
does the unit actually fire just not stay lite... if so then the flame sensor is the culprit..sometimes you can pull it out and lightly sand it don't go crazy because to much sanding can really cause problems... if the unit does not light then what is the sequence it goes through before failing... this unit have a hot surface ignitor i am assumming (glow plug some call it) or is it spark ignition with a module box on it... either way the sequence of operation should be a call from the thermostat made for heat, the enducer draft motor comes on (small motor with a wheel on it) then the enducer draft motor pulls a negative pressure on the pressure switch (round switch with hose attached to it) make sure hose is not kinked or broken,also pull off and check for debri in hose and in holes where it connects to... after pressure switch closes it will send power to ignitor /or spark module once glowing the gas valve should open and allow gas to enter burner orfices and fire ... once unit has lighted then the flame sensor continues to measure milivolt and send bacl to board to keep gas valve open while call for heat... if the flame sensor is dirty or faulty it will not allow the gas valve to stay open. repost with more info ///watch unit where does it fail... most goodman units have a code schematic on the door of unit or inside... should tell you what the number of flashes means if it still is there let it fail and count the number of flashes and then see what code is for that failure.... good luck to you
Posted on Jan 25, 2011
Testimonial: "helpful ,but not the problem ----the unit cycles three times without ignition ----then goes into fault mode-turns out the gas valve was bad "
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There is either a problem with the ignitor or the flame sensor.
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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. 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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