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Old 12-30-2009, 09:39 AM   #1
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controller board replacement


It was suggested I replace the controller board on my Carrier WeatherMaker 8000 two-Speed gas Furnace. Is R&R as simple as cutting all power, pulling all connections, resetting connections to new controller and turning power on again?

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Old 12-30-2009, 12:49 PM   #2
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controller board replacement


What problems are you having with your furnace that a new board is recommended? May not have a board problem at all.
As far as changing the board, is fairly straight forward except some carriers use a different style replacement board that requires additional wiring connections with supplied connectors. If you follow the instructions that come with the board it should be fairly simple.

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Old 12-30-2009, 04:04 PM   #3
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controller board replacement


You asked about problem I am experiencing. Here it is. I got the following error code on my Carrier WeatherMaker 8000 two-Speed gas Furnace which was installed in 1995.

Abnormal Flame proving Signal. Flame is proved while gas valve is de-energized. Inducer will run until fault is cleared. Check for leaky gas valve or stuck-open valve.

I have had an odd phenomena going on since before Thanksgiving. Though 1) we have never smelled a ting of gas, and while 2) the thermostat setting is in the OFF position (No Heat NO cool) with 3) fan setting on auto (only two options - full-on or auto) and then this morning 4) I pulled face plate completly off of the thermostat, the exhaust fan just comes on when temps begin to drop and I get "Abnomal Flame" error code. You would think the heat sequence with burner ignition would follow but it doesn't. Instead the code goes back to normal and then if temps continue to drop the normal heating sequence (e.g., burner ignition) begins and the normal cycle (burner turnoff with heat distribution fan takes place. The house has never gone below or above the desired temp within more 1 to 2 degrees. The heating cycle operates perfectly.
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Old 12-31-2009, 03:00 AM   #4
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controller board replacement


"Abnormal Flame proving Signal" Try cleaning the flame rod with fine steel wool (NOT NOT NOT sand paper. Repeat NOT sandpaper!!!!). I'm not sure that this will fix your problem, but it is a free and easy thing to try. The description of the fault you provided is one I have yet to encounter, and isn't conistente, within itself, with the function of most furnaces.
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