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I have a goodman gcs90703bxa flashes 3 times blowed in the pressure hoses went from 3-2 flashes what could be wrong?>

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Flash 3 is a blocked pressure hose. the switch is open. flash 2 is the pressure switch stucked closed. if you applied pressure to the swich you may have damaged it . It typically clogs on the Induced draft motor housing on the bard fitting that the hose from the pressure switch connects to. sometimes if you take a paper clip and **** it out. but never apply pressure or tools to the switch.

Posted on Sep 15, 2009

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1 Answer

Goodman Gas Heating A/GPG13 Not Heating - Pressure Switch Stuck Open


Clear the little hole where that hose go to the inducer case

Feb 10, 2013 | Goodman Manufacturing Goodman...

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No Heat


3 flashes indicate an issue with either the inducer, pressure switch, plugged condensate drain or a venting restriction.

Clear all debris from the exhaust and intake air piping. Make sure they are not drooping anywhere.
Check the pressure switch and the rubber hoses for blockage.
Blow out the drain line that evacuates the condensation.
On the inducer motor housing, un- plug the rubber hose going to the pressure switch and check to see if there is suction when the motor is running.
Make sure your air filter is clean.
Listen to the inducer motor as it turns for gurgling or any other abnormal sounds.

To make the heater run while you have the cabinet open, tape down the door safety switch. Remove the tape after diagnosos.

Dec 19, 2007 | Goodman GMS90703BXA Heater

1 Answer

I have a goodman gmh95 it stoped coming on and the led on the board is flashing 3 times. anyone have any ideals what this is?


3 times could be the pressure switch stuck open or closed check hoses are tight and not spilt or blocked .

Feb 07, 2013 | Heating & Cooling

1 Answer

I have goodman central air system. AC works, fan on works, heating does not. When I have heat on led flashes 3 times( pressure switch open), I blowed at the rubber hose and I can hear the clicks. I re


Check to make sure the orifice on the inducer motor is clear if it is clear **** on hose going to pressure switch to make sure it closes if ur hear it click while sliwly sucking look to see if igniter lites if igniter lites ur heat should work if it doesnt lite then the pressure switch may be bad

Nov 04, 2012 | Heating & Cooling

1 Answer

My furnace stopped working. It'd start up shut down start up shut down all in the matter of seconds. Then would fire up and work. it did this maybe once every couple days then it stopped all together. ...


Replace pressure switch. If you blow any air into the pressure switch it has been damaged,check air ports for debris by looking never ,never blow on air switch they work on a very small pressure or vaccum,where your breath is to much pressure and also loaded with unwanted humidity.
boilerman56

Mar 04, 2011 | Goodman GMS90703BXA Heater

1 Answer

My Goodman High efficiency furnace stopped working and I getting 3 flashes from the red light in the viewing window. I know that this is a malfunction code but I can't find out what it means. Can you help?


On the panel with the wiring diagram, there is an error code chart. I think 3 flashes is a pressure switch problem. Check your air filter, condensate pump or hoses. Check the small hoses going to the pressure switch, check your air intake and exhaust vents. Remove any moisture or debris. Make sure all venting pitches back to the heating system and no low spots are holding water.

Dec 10, 2009 | Goodman Heating & Cooling

2 Answers

Need to find the pressure switch on my goodman furnace


It's mounted onto the gas valve. It will be a button or lever that you have to push in or down, depending on the style.

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1 Answer

Code 3 - pressure switch stuck open. What do I do


where vent motor is there is usually a hose coming off which oressurizes when vent motor comes on, take hose loose **** or blow in it, take tooth pick and stick in all ports where hose connects (could be clogged) when sucking on hose you shoul hear pressure switch click each time you pull a vacumme, if fan has switch on back of fan as some Goodmans have the vent motor may need to be replaced.

Oct 27, 2009 | Goodman GDS80703ANA Open Flame Mid-Size...

2 Answers

I replaced pressure switch and the light is still blinking three times what is wrong


that means pressure switch failure,
with that particular failure you may want to check
you inducer blower, and your ducting between
usually when you get this failure , its more than likely your inducer is not creating enough flow to trigger the pressure sw.
rather than an actual failure of thepressure switch
read you amps at the inducer it should read around .6 running

Oct 17, 2009 | Goodman GMS90703BXA Heater

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