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HVAC Forums => HVAC Help => Topic started by: robstar on December 21, 2013, 09:56:03 PM

Title: humming noise in the furnace when it's on standby
Post by: robstar on December 21, 2013, 09:56:03 PM
hi, my furnace is making a humming noise when on standby (off cycle)
any help is pretty much appreciated.
Title: Re: humming noise in the furnace when it's on standby
Post by: Admin on December 21, 2013, 10:09:13 PM
What kind of furnace is it?  

I would take off the blower door and push in the door switch and try to pin point the noise.  It could be the transformer if it's secured to something metal.  I have seen alot of ICP furnaces with noisy transformers.  

Try removing the screws holding the transformer in place and see if noise stops.
Title: Re: humming noise in the furnace when it's on standby
Post by: robstar on December 22, 2013, 07:16:27 PM
it's york affinity

I did exactly what you said i put a rubber underneath the transformer and it works noise gone.

thanks, Admin
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