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I have a honeywell comfortmaker, and the blower does not…

I have a honeywell...

I have a honeywell comfortmaker, and the blower does not start - just a high pitched electrical type hum coming from the circuit board. Bad transformer perhaps?

Contractor's Assistant: I'll do all I can to help. How long have you been dealing with this?

Heater would sometimes come on, and sometimes not for a couple weeks now. Now it's just not coming on - or at least the blower part isn't

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

If possible. Most places are closed today

Contractor's Assistant: Anything else we should know to help you best?

Honeywell model NBF100F20G1

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Answered in 3 minutes by:
1/21/2018
HVAC Guru
HVAC Guru, HVAC TECH
Category: HVAC
Satisfied Customers: 18,751
Experience: 20yrs in the HVAC industry with certificates and degrees.
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If you take the panel off is the blower humming?

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Customer reply replied 6 months ago
Blower motor is not humming. There's a high pitched whine coming from the circuit board
Checked capacitance on capacitor, since that's usually the cause of a fan not running - got 8.98 on a 10uf capacitor.
Tried spinning the fan to start, does not start.

I would say the baord is bad if the noise is coming from the board. Can you see what part on the board is making the noise?

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Customer reply replied 6 months ago
Can't really isolate the sound, but it does sound like a bad transformer maybe.
Guess I can check to see if it's putting out 24v

Yes check it out that would be about the only thing that could be making the noise, but if it is something on the board replace the board.

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HVAC Guru
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