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Blue46 11-24-2008 11:29 AM

Code 31 on my Bryant furnace.
I have Bryant Plus 80 HE heater.

The heater works on and off and when it doesn't work the code comes up 31.

I have never worked on a furnace before so all I know how to do is clean it and change the filter.

I had a repair man come out the other day and he said I needed a new Furnace control board that cost 400 dollars.

I know that isn't much to go on but does this sound like the real problem or could it be something smaller I could maybe fix.

I would like to replace the whole furnace in a few years so I hate to spend 400 bucks on it now.

Any suggestions would be great,
Thank You

HvacWiz 11-24-2008 12:26 PM

Code 31 is a pressure switch fault, which is usually a simple fix, I would get anthor opinion. Could be blocked vent, bad pressure switch, or blocked pressure switch tubing, or plugged up on in the collector box where the pressure switch hose connects to.

Blue46 11-24-2008 11:30 PM

Thanks HvacWiz,

But I had to work 12 hours today and my wife was home all day and cold, so she called the guy back even though I wanted to wait.:furious:

So needless to say, 400 bucks later, I have a new board, and the heater is working.

I just hope the guy was honest?

Atleast it is warm now I guess.

Thanks again.

dac122 11-25-2008 06:46 AM

$400 isn't too bad if indeed it was the board. The labor to diagnose by process of elimination, labor to replace is probably a couple hours and the cost of the board $100 - $200. If you get a few more years out of the unit you'll get your money's worth.

Blue46 11-25-2008 12:42 PM

Thats true, I hope it lasts atleast 2 more years, with this economy so bad you never know which company will lay off workers next.

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