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I have a goodman model#GMH80703ANAA SERIAL#0607148632 -I HAVE NO MANUAL AND WAS WONDERING WHAT THE LOW FIRE ON GAS VALVE IWC SUPPOST TO BE SET AT. AND WHAT THE HIGH FIRE IWC PRESSURE SHOULD BE SET TO.I do work for arapahoe county ,and a lisenced furnace tech.

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I have done this 34 years and never need to know this . simply replace the $15 part to see if it works, labors not cheap and its better value to the customer for you to sawp it out on a call even if its not bad yet as they are 1 of the weak links that you know will fail . if it doesnt work, which i never saw except when the orifice on the induced draft housing was carboned up! or 1 time the induced draft squirrel cage was disintegrated with the motors shaft left spinning nothing and doing nothing as toinducing any draft! threw mw as the motor was working! and orifice clear and new switch but still not working!!! had to be the cage or poltergeist lol!

Posted on Feb 25, 2012


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: My GOODMAN furnace GMH80703ANAA Starts but quits 5 seconds later

You have a flame sensor that may just need cleaning take out and take fine sand paper or emery cloth and clean

Posted on Nov 30, 2008

  • 230 Answers

SOURCE: goodman gms9090 furnace

Based on your description I would guess that there is a "leak" somewhere between the gas valve and the actual fire. Use soap bubbles to check the connections at the gas valve. Also check the gaskets in the Gas valve the same way. Lastly there may be a cracked or misaligned burner causing the "leak". Best of Luck!

Posted on Jan 29, 2009

  • 15 Answers

SOURCE: Goodman furnace fires up but turns off soon after (over and over)

check grounding and make sure flame sensor is nt dirty .

Posted on Jan 24, 2010

Testimonial: "I cleaned the flame sensor, and that has seemed to do the trick! No problems since then. Thanks!"

  • 1998 Answers

SOURCE: I have a goodman GMPN1 gas furnace It goes through

have you checked the pressure switch and also to assure that the flu is clear? can you light the burner with a match and when you do how long does it run for? have you checked the clearance to the burner have you also assured that where the ignitor is pluged into is cleaned ive also noticed on another site there is a board issue with this model have you checked the board ? also have a look at this site as well its where I usually talk with other techs about issues they have with the goodman as well as other units please message me back with the answers to the questions that I have asked and I await your reply Thanks again Rick

Posted on Jan 31, 2011

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