Question about Goodman GMS90703BXA Heater

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Furnace start buts shuts off

My furnace induction motor start for a few seconds then blows the 3amp fuse on the board. If I unplug the pressure switch the induction fan will run, the fuse will not blow and of course the furnace will not ignite. After a while the furnace will eventualy start, run and provide heat. My unit is a Goodman GMNT 120-5

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  • Anonymous Mar 17, 2014

    my goodman furnace gks9 starts blower runs and after few minutes burner stops

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  • 69 Answers

It sounds like you have an obstruction in the exhaust vent. Thats why when you bybass the pressure switch it runs ok. Steve

Posted on Dec 21, 2008

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Posted on Jan 02, 2017

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1 Answer

We have royal red furnace to heat our home.The fan dose not stop.


Details.......does the furnace function normally otherwise? Might just be a stuck fan switch. Make sure the thermostat hasn't been set on Fan ON setting or summer air circ. on older furnaces.
Find the fan switch and tap it and see if fan quits. If it does,fan switch is bad.probably. Always make sure your air circ. filter(return air to furnace) is replaced every 3 mo. or so,too. don-ohio (:^)

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Electric Furnace stopped running


You have one of two problems. Either the capacitor for the motor has failed or the motor has failed. I would turn off the power to the unit and see if you can locate the capacitor and remove it. An ac supply or electrical supply house can match up the capacitor. This is relatively inexpensive. Otherwise you will need a new motor.

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Is it cost effective to replace draft inducer blower on 22 year old furnace?


Depends on the cost to repair. Probably a 22 year old furnace is not very efficient also. Take every thing into consideration.
If it still works it may work for a while but you don't want a break down in the middle of winter.

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