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Old furnace fan speed toggle switch? Squeaky fan. #4809206
07/09/18 01:00 PM
07/09/18 01:00 PM
Joined: Oct 2011
Posts: 3,031
Chicago, IL
Brybo86 Offline OP
Brybo86  Offline OP

Joined: Oct 2011
Posts: 3,031
Chicago, IL
So the fan motor bearings were squeaking before winter I oiled them and it stopped squeaking

Now I was gone for a week and fan didn't spin.
I come home and they are really squeaky. Oiled again and they are quiet.

I'm thinking I should just buy a new motor?
Anyway to decipher what I currently have?
Fasco 8557?



I think it is a 1/2 HP?

Also I noticed that there is a capacitor and a manual fan switch wired in line between the furnace board and the motor.

It is and has been on the slower setting I think for the last 2 years.
Should it be toggled to the high setting for AC?







Last edited by Brybo86; 07/09/18 01:05 PM.

08 Honda Accord EX-L 2.4L M1 EP 0w20 153k
01 Kymco People 50
95 Lexus LS400 M1 AFE 0w30 199k
95 Yamaha Jog
Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: Brybo86] #4809223
07/09/18 01:17 PM
07/09/18 01:17 PM
Joined: Jun 2002
Posts: 12,883
The Motor City
Kestas Offline
Global Moderator
Kestas  Offline
Global Moderator

Joined: Jun 2002
Posts: 12,883
The Motor City
I don't know how much these motors cost, but I've had motors rebuilt before. There are outfits around that rebuild electric motors. I'm just suggesting an option.

Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: Brybo86] #4809293
07/09/18 02:37 PM
07/09/18 02:37 PM
Joined: Jun 2003
Posts: 5,979
Illinois
SHOZ Offline
SHOZ  Offline

Joined: Jun 2003
Posts: 5,979
Illinois
If you wanted to try it's pretty easy to pull those type motors apart and use some red motor grease in the ends.

I have a two speed fan but run it on low all the time. The AC unit is too big and doesn't run long enough with it on high.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: Brybo86] #4809304
07/09/18 02:52 PM
07/09/18 02:52 PM
Joined: Dec 2012
Posts: 686
Washington for now
WhyMe Offline
WhyMe  Offline

Joined: Dec 2012
Posts: 686
Washington for now
blower motors are pretty cheap these day. under 100 usually. i would replace it and keep the old one as a spare. get a new cap also. its good to have a spare in case its 10 below outside on a weekend and your fan motor decides to leave this world

Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: Brybo86] #4809325
07/09/18 03:14 PM
07/09/18 03:14 PM
Joined: Feb 2010
Posts: 4,838
Central Texas
sleddriver Offline
sleddriver  Offline

Joined: Feb 2010
Posts: 4,838
Central Texas
You may or may not be able to remove that blower without a puller. You need to be able to split the motor case to soak the bushing wick if there are no external oil ports.

Even if you buy a new motor, that blower wheel is really dirty which greatly impacts its ability to move air. When those little fins get filled with junk like that they no longer act as airfoils and CFM drops. There's also evidence of black mold growing on the housing and inside the cabinet. That's not good. Also time to clean the evaporator coil if you have air-cond.

You'll notice a world of difference....


1998 Volvo V70 T5 228,880 mi. Original Owner.
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"It's never a mistake to buy tools, defined broadly. They're not a cost, they're an investment." - J.B. Peterson
Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: Brybo86] #4809328
07/09/18 03:16 PM
07/09/18 03:16 PM
Joined: Apr 2004
Posts: 5,358
Texas
JustinH Offline
JustinH  Offline

Joined: Apr 2004
Posts: 5,358
Texas
in NY there were plenty of places who can rebuild an electric motor, but I bet they can't beat the price of ebay or amazon.


'11 Hyundai Sonata GLS
'11 Scion XB
Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: Brybo86] #4809330
07/09/18 03:17 PM
07/09/18 03:17 PM
Joined: Dec 2003
Posts: 10,088
Florida, Cape Coral
Eddie Offline
Eddie  Offline

Joined: Dec 2003
Posts: 10,088
Florida, Cape Coral
I wish you lived closer. I replaced one in my AC unit and used it for 1-2 months before the main pump went out and had to get a new AC. Like new blower motor for sale. Ed


CX5 Touring 2.5L :-)
Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: Brybo86] #4809331
07/09/18 03:19 PM
07/09/18 03:19 PM
Joined: Mar 2013
Posts: 969
Florida
laserred96gt Offline
laserred96gt  Offline

Joined: Mar 2013
Posts: 969
Florida
1075 RPM, 115V, 4 speed.
Grainger, for the ones who get it done.

Remember to sand and lube the shaft really good otherwise you may catch [censored], capacitor also.

Last edited by laserred96gt; 07/09/18 03:23 PM.

2017 4Runner Limited, 44k
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Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: Brybo86] #4809406
07/09/18 04:50 PM
07/09/18 04:50 PM
Joined: Jul 2014
Posts: 1,117
Winnipeg MB CA
Number_35 Online content
Number_35  Online Content

Joined: Jul 2014
Posts: 1,117
Winnipeg MB CA
These motors tend to be pretty generic. I changed ours out the winter before last, and used the existing brackets to adapt the new motor. It was not a problem. (It's the 3rd motor - they last about 12 years for me.)

Ours has an external relay which turns the fan speed to High when the furnace calls for heat. The rest of the time it runs on Low. (We have an aftermarket HRV which uses the furnace plenum for circulation, so the furnace fan has to run full-time for the HRV to be effective.) The relay wiring is straight-forward. Let me know if you want photos.

Re: Old furnace fan speed toggle switch? Squeaky fan. [Re: WhyMe] #4809479
07/09/18 05:59 PM
07/09/18 05:59 PM
Joined: Jul 2014
Posts: 1,117
Winnipeg MB CA
Number_35 Online content
Number_35  Online Content

Joined: Jul 2014
Posts: 1,117
Winnipeg MB CA
Originally Posted By: WhyMe
blower motors are pretty cheap these day. under 100 usually. i would replace it and keep the old one as a spare. get a new cap also. its good to have a spare in case its 10 below outside on a weekend and your fan motor decides to leave this world

You're absolutely right - both of mine have failed in January.

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