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Old 04-11-2010, 08:11 PM   #1
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Installed new ecm 2.3,and blower still dances around


Can faulty control board on 90 plus furnace make the variable speed motor dance around? The furnace is 98 model with 2.3 module.

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Old 04-11-2010, 11:34 PM   #2
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Installed new ecm 2.3,and blower still dances around


Yes it can.
Did you use the motor for that model furnace. Or did you just get a ECM motor?

Did you follow the test instructions before condemning the motor?
Or an ECM motor tester?

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Old 04-12-2010, 06:44 PM   #3
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Installed new ecm 2.3,and blower still dances around


I checked motor,checked voltage to motor,And I did something my old boss told me to never do,which is assume..So it totally bit me in a**..I however did get instructions out of manual from carrrier to verify that it has a bad board.Oh and i think im going to get get motor tester,I only work on maybe 3 a year so i never got one.
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