Non working 1982 GE Gas Fired Forced Air Furnace

Jan 29, 2008 4 Replies
C

The GE furnace is a model BLU055E936.



Problem: The blower motor hums and if I don't turn it off immediately, it would burn up. I know this because this is the 3rd motor this winter. The motor will get up to speed if you secure the service door switch and wait for that moment when it just starts to hum and then give it a push start with your hand. The blower motor won't come on even when the fan is selected on the thermostat.



Attempted Fixes: Everything electrical and mechanical has been replaced, which includes: Motor, Capacitor, Relay, Transformer, Limit Switch, Thermal Coupler, Gas Valve, Fusible Link, Thermostat and all low voltage and hi voltage wiring. All of the parts were ordered using the information on the furnace. The wiring was rewired using a schematic for this unit. The breakers and wiring where the power enters the house has be cleaned up and new breakers installed. We have even had an HVAC Technician come over and he was unable to figure it out.



Is there anyone out there that can shed some light on a possible fix?



Thank you very much in advance.


Vote
Twitter Facebook LinkedIn
J

PSC cap wire needs to be connected opp of the motor common on the mains buss terminal.

HTH

Vote
Twitter Facebook LinkedIn
B

That's your third motor, and you replaced "everything electrical and mechanical". You couldn't have used a competent service company, because 1) they wouldn't have replaced all those parts, and 2) they would have had a lot of them on their truck, and 3) no technician would rewire an entire furnace because of a blower motor.

So you did all this work yourself, and THEN you called someone. If a competent technician found out you did all that stuff, he's be wise to pack up his tools and back out the door without touching it. He'd also be smart to not charge you and give you nothing in writing saying he was ever there. Way too much liability.

That furnace was made in 1979 or 80, and is about 65% efficient. Replace it with a 90+ furnace installed by a reputable local company. That's the best fix.

Vote
Twitter Facebook LinkedIn
J

You don't fix these things with wholesale parts replacement. Who knows what's wrong with it now. You wired it incorrectly? The others are right, you could of had a new one for the work you put into this one. Most of those parts have nothing to do with the fan.

What was wrong with the prior motors? Shorted? Open? Are you getting a good solid 115v to the fan motor? With a load on it? If you suspect the supply you should be able to make the fan run independently of the rest of the unit with a known good 115v.

Vote
Twitter Facebook LinkedIn

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required