Squealing noise from furnace

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Squealing noise from furnace

Postby Louie » Fri Feb 22, 2008 10:33 pm

I was woke up early this morning by a squealing noise coming from the furnace,when i went to check i noticed you could hit the the blower housing a little bit and it would quite.

But you could still hear it doing it a little bit - sometimes barely, sometimes really loud and sometimes not at all.

I suspect the bearings in the blower motor are going bad,cause when the blower shut off i reached in and grabbed the shaft and it feels like it has a little bit of play up and down.

Does this sound like the problem?

Brand "Coleman"

Model Number
3500A812

Volts/HZ/Phase
240vac/60/1


Thanks
Louie
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RE: Squealing noise from furnace

Postby Robert » Sun Feb 24, 2008 2:48 am

Hi Louie,

Possibly, but the motor shaft does have a little play in it.


Was motor hot and can you spin the wheel for several revolutions ?



Thanks,
Robert
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RE: Squealing noise from furnace

Postby Louie » Tue Feb 26, 2008 7:50 am

Robert,

Sorry i have not gotten back sooner but have been very sick past few days.

Now as far as my problem,i did not pay attention to whether the motor was hot or not, and the fan seems to spin fairly easy. Never known for motors to have play in the bearings.

I have not had the same problem since it happened that one time.
So I'm not really sure what the problem was.

I'm thinking maybe i ought to buy the parts i need for backup just in case, the motor is working on 17 years old. So i guess i can't complain to much.

Can you give me a price on the parts i need, I'm guessing motor,cap,isolator kit.

If i buy a new molex plug for the motor can i push the wire pins into the plug with out having the special tool.

Sorry for the long post.

Brand "Coleman"

Model Number
3500A812

Volts/HZ/Phase
240vac/60/1


Thanks
Louie
Louie
 
Posts: 12
Joined: Mon Feb 04, 2008 5:12 pm

RE: Squealing noise from furnace

Postby Robert » Wed Feb 27, 2008 2:00 am

Hi Louie,


Sorry you've been sick, hope you're feeling better.


Do you have heat only or heat and a/c ?


By isolator kit, are you referring to the rubber bushings for the brackets feet ?


Thanks,
Robert
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RE: Squealing noise from furnace

Postby Louie » Wed Feb 27, 2008 10:56 am

Robert,

Yes i have heat and a/c with a separate outside a/c unit.

And yes you are correct on the isolator kit.


Thanks
Louie
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RE: Squealing noise from furnace

Postby Robert » Wed Feb 27, 2008 2:31 pm

Hi Louie,


Blower Motor # 3400A321P @ $199.37

Run Capacitor # 1499-4421 @ $6.61

Motor Isolator Kit # 2702-4091 @ $27.57

Shipping = $19.75

Total = $253.30


You can see and order them through PayPal from this page :

http://www.mobilehomerepair.com/ColemanElec.html


Or by calling toll free after 9 AM CST to 1-877-263-7860 and

charging to Visa or Mastercard.


Here is page for ordering Molex Plugs and Pins if needed :

http://www.mobilehomerepair.com/FurnaceElec.html


You crimp the pins onto wires and push them into the Molex Plugs until they catch.


The tool is for removing them.




Let me know if outside the U.S. for added ordering info.



Thanks for inquiring.


Take care and best wishes,
Robert
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RE: Squealing noise from furnace

Postby Louie » Wed Feb 27, 2008 5:58 pm

Robert,

I was looking at the list of parts you gave and the motor you listed looks like it has to many wires.

It looks like it has 6 wires including ground, where my existing motor only has 5 wires including ground.


Thanks
Louie
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RE: Squealing noise from furnace

Postby Robert » Wed Feb 27, 2008 7:18 pm

Hi Louie,


That is correct motor. IF there is an extra wire, it is unused.




Thanks,
Robert
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