LED Blinks 3 times when Goodman GDS80904BNA furnace quits working. Hose is not kinked from fan to pressure switch. When working, I can disconnect one wire to pressure switch and gas shuts off like it should. The odd thing is that if I leave the front cover off, the furnace will run flawlessly. I am thinking that the board need to be replaced. Any help is greatly appreciated.
Had similar problems with same furnace. I think the 3 blinks is high limit event. either way with the power off to the furnace remove the board from the 4 clips holding it on one at a time then turn it over and look at it you will be able to tell if the board is bad because it will appear scortched and the resin will be bubbled up where it went bad. replace board and you will be fine. went through 2 in 2 years all of a sudden they are being made by a different company from the original and the 1st replacement. now all is fine. Take a good picture of the board close up so you can reconnect all the wires properly. Friend of mine got it from a wholesaler for $55.00
Testimonial: "The circuit board was definately the problem. Got it replace (still under warranty) with an updated board and everything is working great. Thanks!"
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I disconnected the wires on top from the thermostat and flipped the circuit board over and there was discoloration in a couple of spots so I am pretty sure the board is bad. I will order a new one that is the improved version of the PCBBF112S. Here is a pic of the back of the board.http://hphotos-snc3.fbcdn.net/hs066.snc3...
John White, it could very well be the pressure switch... this is well documented in this video blog:http://gasfurnacestartupsequence.blogspo...
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