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leosdad · May 24, 2009, 07:41 AM

I have a cumberland model fuab100a4ob0 it's a gas furnace with a/c. The condenser unit will run but the fan blower won't run I checked the breakers they are OK .Is there some fuse to check or is there a way to by pass something to get the blower motor working .you can spin the fan by hand it turn easy. It's a holiday weekend and its hot out.
I was not able to find the cumberland companies web site for help.
Thank you

wmproop · May 24, 2009, 08:10 PM

Does the fan work in heat mode?
Does it work when tstat is set for fan/fan only instead of on auto?

T-Top · May 24, 2009, 08:22 PM

You need to check voltage going to the blower motor. It can be a bad thermostat, run capacitor,blower control or motor.If the blower will not run with the fan switch in the on position at the thermostat its time to get some voltage readings.

leosdad · May 26, 2009, 06:03 AM

Originally Posted by T-Top

You need to check voltage going to the blower motor. It can be a bad thermostat, run capacitor,blower control or motor.If the blower will not run with the fan switch in the on position at the thermostat its time to get some voltage readings.

I took the blower motor wire off the board and put it into the power on the door safety switch the blower works fine. Would a bad tstat or mabe tstat wire be the problem, or do you think it's the board?thank you for your time

leosdad · May 26, 2009, 06:09 AM

Originally Posted by wmproop

does the fan work in heat mode?
does it work when tstat is set for fan/fan only instead of on auto?

no. Its not getting power on the board
Since I asked the question I found out the fan works when I give it power off its location on the board to the door safety switch. Thank you for your time

Joshdta · May 26, 2009, 04:33 PM

Sounds like you need a new control board.

leosdad · May 26, 2009, 06:40 PM

Originally Posted by Joshdta

sounds like you need a new control board.

Thank you ,I called a local supply house , they tell me a board is $175.00 Trane
Made a modification so it changes more then just the board unless I can find the same board some where I stuck with the hight price.
Thank you for your help

Joshdta · May 26, 2009, 07:28 PM

Is it a 50 e 50 board? Or a 50 e 47?

leosdad · May 27, 2009, 07:02 AM

How do I find out which board it is the supply house wanted the unit model number they researched it that way but they didn't tell me the board model .there is numbers on the board I will check when I get back home tonight.Thank you