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Specs: Goodman Model GDS80703, over 10 years old, Control board replaced 2 years ago

2 months ago, it just started glowing and not igniting, and after doing some basic troubleshooting (Reboot, clean filters, reset thermostat) the problem wasn't solved

As there was sufficient voltage to the gas valve, I was advised by a tech over the phone to replace the gas valve, and did so, It fired up about three times, and each time it didn't reach the temperature desired

Now, we're back at square one, and so we come to you, the people of the internet, for help.

  • Did it keep burning without reaching temp, or did the burner cut out prematurely? Also, what did you use for a replacement gas valve? – ThreePhaseEel Feb 15 '17 at 0:13
  • Is the gas valve opening? Is gas coming out of the orifice(s)? Did you take a close look at the old valve, to see if it was clogged up? Do you have other gas fired appliances? If so, are those appliances working normally? Is the gas pressure sufficient? – Tester101 Feb 15 '17 at 12:02
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    Along the lines of the valve being plugged (this can happen with water and or oil in the lines). Is there a "drip leg" prior to the valve. A drip leg is a T in the pipe with a short leg that is capped. This leg catches the contamination before it can get into the valve. 1 drop of water can cause problems in a gas valve because the pressure is so low. If you have a drip leg turn the gas off and remove the cap, it may be full of liquid and residual gas pressure. If you don't have a drip leg check the valve for moisture as this could be the cause of your problem if so install a drip leg. – Ed Beal Feb 15 '17 at 21:06
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If you follow the (3) wires from gas valve, two end up on the control board and one goes to a limit switch on the blower. This limit switch was burnt out on my furnace. It's a relatively inexpensive part to replace. Good luck.

  • Hello, and welcome to Home Improvement. Thanks for the answer; keep 'em coming. And, you should probably take our tour so you'll know how best to contribute here. – Daniel Griscom Oct 20 at 16:36
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use a new hot surface ignitor ----goodman only----no universal they dont line up

  • Hello, and welcome to Home Improvement. We prefer answers that are more than one sentence; would you add a bit of supporting info? Thanks. – Daniel Griscom Feb 17 at 17:31

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