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I have a mobile home furnace and it won't turn on. Yes. Once…

Customer Question
I have a Coleman...

I have a Coleman mobile home furnace and it won't turn on.

Contractor's Assistant: Did you check the furnace's filters?

Yes. Once there is a call for heat, my inducer motor just hums and nothing.

Contractor's Assistant: Do you plan on doing the work yourself?

Maybe. Thought it was a bad motor so I replaced it.

Submitted: 5 months ago.Category: HVAC
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Answered in 13 minutes by:
11/17/2017
HVAC Technician: Gaztech, HVAC Technician replied 5 months ago
Gaztech
Gaztech, HVAC Technician
Category: HVAC
Satisfied Customers: 795
Experience: Owner at Gaztech
Verified

Hi I amCustomer a independent technician, I will assist you with your issue.

Don't forget to rate the 5 star rating AT THE TOP OF PAGE after we are done. this will credit me for assisting you.

If it hums it could be stuck if its the first time starting this year, if you can see inside motor try to turn it to see if it does turn free or if it is seized

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Customer reply replied 5 months ago
I replaced the motor and the new one does the same thing.
HVAC Technician: Gaztech, HVAC Technician replied 5 months ago

So motor turns free?

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HVAC Technician: Gaztech, HVAC Technician replied 5 months ago

Is there a capacitor for that motor, and if yes, did you replace it

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Customer reply replied 5 months ago
No capacitor. Motor turns free.
HVAC Technician: Gaztech, HVAC Technician replied 5 months ago

did you checked voltage for 120 volts ac?

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Customer reply replied 5 months ago
It's getting 120v.
HVAC Technician: Gaztech, HVAC Technician replied 5 months ago

well that makes no sense,

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Customer reply replied 5 months ago
Tell me about it. It has a centrifugal switch on the motor which won't close and send 24v to the igniter module.
Customer reply replied 5 months ago
wiring diagram is all worn off in the furnace.
HVAC Technician: Gaztech, HVAC Technician replied 5 months ago

OK then take inducer fan out, and try another power source

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Customer reply replied 5 months ago
I've jumpered 120v from switch straight to motor leg and still just hums.
HVAC Technician: Gaztech, HVAC Technician replied 5 months ago

All I can think is you got a bad replacement motor!!

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Customer reply replied 5 months ago
How often do these need oiled?
HVAC Technician: Gaztech, HVAC Technician replied 5 months ago

If theres oiler tubes on it?? once before heating season, but should be sealed bearings

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Customer reply replied 5 months ago
There r oil tubes. Do either of these relays control the motor?
HVAC Technician: Gaztech, HVAC Technician replied 5 months ago

can you attatch photo?

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