Question about Goodman GMS90703BXA Heater

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Amana won't fire, inducer blower constantly runs.

My 3 year old Amana is giving me some serious issues. I have had 5 servicemen over now who haven't been able to fix it. The problem seems to be that after a successful heating, the inducer blower does not turn off. The unit is then unable to fire again. At this point I get the double blink from the control module that translates to "Low fire pressure switch stuck closed" Any Ideas? Help!

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  • kevinmc42 Dec 17, 2008

    Unfortunately I did have these replaced. No luck :( Any other ideas?

  • local24801 Jan 31, 2009

    My father has an older goodman gas package unit. It will fire, satisfy the thermostat, then the power exhaust motor and circulating fan still runs. Two servicemen have been there and replaced the board twice, also the flame ignitor and pilot assembly. It is still doing the same thing. They have scratched their heads and do not have a clue. Does anyone have a clue, all the limits are working fine and the loop is fine. The only thing left in my mind is the gas valve sending maybe a false signal that it is still open to the board. He has spent six hundred dollars already and still has no heat.

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Check the condensate drain, hoses and pump if it has one. Like Drumbanger says, check the pressure switch. Also check the intake and exhaust vent for blockage of water or debris. All water should drain back to the furnace and not collect in the venting. Your furnace has two pressure switches, replace the low pressure switch.

Posted on Feb 18, 2009

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It sounds to me like the pressure switches need replaced or they need removed and shaken upside down to get the condonsation out of them!Good luck and Thank you for using FixYa.

Posted on Dec 17, 2008

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1. Manual - reset, when used.
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That is all the parts. The first thing the heater gets a call from the thermostat to the control board marked W. The board sends 24v to the inducer fan relay which makes and causes the inducer fan to come on now there is a small tube that runs from the inducer fan box to a switch when the switch makes it sends power to the board which proves you have cleared the exhaust flue then the flat surface ignitor starts to glow and then gas valve opens and fires. now if this tube is stopped up the heater will not fire and will lock the unit out. Also if the flue is stopped up with trash it will do the same thing. If you are not familiar with gas heating units you should call a service company out and check out the system there is a lot of things that need to be checked out every heating season as to keep you and your family safe.

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Good morninng, My Goodman furnace inducer stops and starts at various intervals. At times it runs fine but starts the same issue. Everything starts up accordingly, runs and then the inducer stops for...


Replacing the board, flame sensor, and pressure switch, and cleaning out the induction motor was definitely a good start. Other things to check would be a blocked or restricted flue pipe, I have ran into a few bird nest before!, and you also want to check or replace the hose that runs from the inducer to the pressure switch if you haven't already. To be honest, most of the time I clear out the nipple on the inducer where the hose goes with a small piece of wire and it works. The last thing I would suggest is making sure the new pressure switch is rated for what you need. Alot of the revisions on furnaces actually call for less than the original pressure just for this problem. Hope this helps and good luck!

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I have an Amana High Efficiency furnace that I purchased 5 years ago this past October (2009). My furnace started making a horrible noise last night and then stopped working. The repair person, told me my draft inducer motor needed replaced, and showed me where the plastic fan blade inside of the inducer was "chewed up." Of course my first question is, "How can a 5 year old furnace need such a costly repair already?" The only answer I received is that it will cost me close to $500.00 to have the situation remedied (service call, parts, labor). I started looking around on the internet today, and discovered that high efficiency furnace inducer motors are usually encased in plastic and the motor fan blades are made of plastic rather than metal like the lower efficiency models. Turns out that these plastic blades over time can't withstand the high heat generated and in time (they estimate 3-4 years) break. The damage to the blades causes an imbalance in the way they spin, which in turn, generates the resulting problem of a damaged draft inducer motor. Appears this is a design flaw. Yeah! I'll say. I spent $3100.00 for a brand new furnace and 5 years later I'm paying another $500.00 and apparently can look forward to doing the same in 3-5 more years! Maybe this answers in part your question?

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Main blower constant run with t- stat off //No heat


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If one of the above is not in the right time and place the rest will not work. About the fan it is either a shorted control wire for the fan or the limit switch (the high temperature limit) is made or bad.
If that is not the case the the thermostat has a switch in the back between the gas fired or electric. That will determine if the fan should be on every call for heat.

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My 3 year old Amana is giving me some serious issues. I have had 5 servicemen over now who haven't been able to fix it. The problem seems to be that after a successful heating, the inducer blower does...


A service tech "should" eliminate each potential problem part before replacement.
If the problem is intermitent, that can be a challenge.

If its not the the swithc, and three techs have looked at it, I would suspect the board as it is what sends signal to all the switches, and produced the diagnostic codes.

Bad boards can also send false failures to other components.

I'd replace the board.

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