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Discussion Starter #1
Woke up this morning to find the house at 60 degrees. No heat.
Checked the furnace and found that the door had vibrated loose and door switch had cut power. Fixed that, but then had a 3 flash error code and no heat.
Some months ago, I noticed 2 electrolytic capacitors on the control board were swollen. Being in the electronics repair industry, I've seen PLENTY of those, so I was not surprised, just disappointed that they used such cheesy parts in something that should be reliable. In any case, one of them failed completely when the furnace was powered up. I had ordered some new high quality conductive polymer caps to replace them a long time ago and never did.

Lesson learned. Check your control board for this. They're obvious. The tops of them, which should be flat, are bulged. Replace them. It will save you a headache! :thumbsup:

You can see a picture of one of them here. It's right in the center of the pic. It's a bit hard to tell, but the top is bulged out a bit.
http://i1071.photobucket.com/albums/u516/pcbman_photo/HPIM1175.jpg

Cheers!
 

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Might not have been the manufacturer's fault... there are a ton of counterfeit capacitors coming from China. They're marked with reputable names but are totally counterfeit, and hard to spot. Manufacturers and vendors are getting scammed. I've even seen them turn up in aerospace applications.
 

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Discussion Starter #3
Might not have been the manufacturer's fault... there are a ton of counterfeit capacitors coming from China. They're marked with reputable names but are totally counterfeit, and hard to spot. Manufacturers and vendors are getting scammed. I've even seen them turn up in aerospace applications.
Oh, fur shur! I don't think AS would intentionally use bad caps. I deal with this every day, which is why I saw them in the first place. I probably change 1000 capacitors a month, some swollen and obvious, some not. They first showed up in large numbers in computers, now they're everywhere. Fabulous. I shouldn't complain. I make a living replacing them! :laughing:
 

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Don't know about capacitors but I'm getting three flashes and no gas ignition. Can tap on pressure switch an get action sometimes. Not today. Change pressure switch? Looks like a simple swap.
 

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could be pressure switch or it could be the inducer, or a clogged orifice. the pressure switch's job is to check for something, if that something is not there it does not mean the pressure switch is bad
 
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