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-   -   Gas Furnace won't turn on and smells like burnt rubber (http://www.diychatroom.com/f17/gas-furnace-wont-turn-smells-like-burnt-rubber-94649/)

Jersey Pete 02-05-2011 07:02 PM

Gas Furnace won't turn on and smells like burnt rubber
 
The blower will go on if I switch it to on, if I put it on automatic it will sometimes make a loud humming noise for up to ten minutes before turning on. It also smells like something is burning. If more info is needed please ask. Thank you.

handy man88 02-05-2011 08:44 PM

Quote:

Originally Posted by Jersey Pete (Post 585425)
The blower will go on if I switch it to on, if I put it on automatic it will sometimes make a loud humming noise for up to ten minutes before turning on. It also smells like something is burning. If more info is needed please ask. Thank you.

Is something hung up?

hvaclover 02-06-2011 02:18 AM

First thing that comes to mind is that the blower is going or the second one is a weak motor capacitor.

Jersey Pete 02-06-2011 07:40 AM

Quote:

Originally Posted by [LEFT
hvaclover[/LEFT];585597]First thing that comes to mind is that the blower is going or the second on is a weak motor capacitor.

I replaced the capacitor and still have the same problem.
Isn't
there a way to oil the blower?

Jersey Pete 02-06-2011 07:40 AM

Quote:

Originally Posted by handy man88 (Post 585481)
Is something hung up?

what do you mean?

Jersey Pete 02-06-2011 07:45 AM

The one thing I am confused about. If the problem may be the blower, why does it work ok when the switch is on but takes forever to go on with the switch to auto?

handy man88 02-06-2011 07:56 AM

Quote:

Originally Posted by Jersey Pete (Post 585622)
what do you mean?

Question was whether the something was physically interfering with the blower turning.

Jackofall1 02-06-2011 07:59 AM

Quote:

Originally Posted by Jersey Pete (Post 585623)
The one thing I am confused about. If the problem may be the blower, why does it work ok when the switch is on but takes forever to go on with the switch to auto?

Not sure as I am not looking at it, your motor could be a 2 speed motor, whereby the manual switch is wired to a different set of windings, regardless, the blower motor not starting when the call for heat turns it on, tells me that it will eventually fail completely.

Mark

Jersey Pete 02-06-2011 08:00 AM

Quote:

Originally Posted by handy man88 (Post 585629)
Question was whether the something was physically interfering with the blower turning.

Ah, well I don't think so because it goes on when i put the switch to on.
Wouldn't
it not go on in any mode if it was stuck?

Jersey Pete 02-06-2011 08:05 AM

Quote:

Originally Posted by Jackofall1 (Post 585631)
Not sure as I am not looking at it, your motor could be a 2 speed motor, whereby the manual switch is wired to a different set of windings, regardless, the blower motor not starting when the call for heat turns it on, tells me that it will eventually fail completely.

Mark

So are you saying a possible motor issue not a blower?

Jackofall1 02-06-2011 08:08 AM

Yes, the motor in most units, is intregral to the blower, in other words, the motor would be mounted directly to the wheel of the blower. The smell is the insulation on the motor winding getting too hot.

Granger or McMaster Carr, will have your motor in stock, but won't be open til tomorrow.

Mark

Jersey Pete 02-06-2011 08:16 AM

Quote:

Originally Posted by Jackofall1 (Post 585637)
Yes, the motor in most units, is intregral to the blower, in other words, the motor would be mounted directly to the wheel of the blower. The smell is the insulation on the motor winding getting too hot.

Granger or McMaster Carr, will have your motor in stock, but won't be open til tomorrow.

Mark

Could this result in a possible fire?

Jackofall1 02-06-2011 08:17 AM

No, but when the motor finally give in, it will really stink bad and you will have no heat.

Mark

Jersey Pete 02-06-2011 11:19 AM

Thanks for the info. How do I figure out exactly what type of motor I need to get?

Jackofall1 02-06-2011 11:20 AM

First you need the model # and manufacturer of the furnace, or, just dismantle the fan and take the motor with you.


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