Carrier Central AC making Loud "buzz" noise when kicks on

by Gary
(Chciago, IL)

Carrier Central AC unit specs

Carrier Central AC unit specs

When the central ac unit kicks on every time this past week, there is a loud noise, sounds like a machine fart. This is a Carrier Model # 38CKC042350

I believe that this noise is coming from the blower inside our house, and not Carrier unit, which is on our roof but I am unsure.

After 1-3 seconds the noise stops and the blower kicks on. The noise happened for less than a second as I am typing this and then sounds like our refrigerator, so maybe it is part of the refrigeration piece. I am not sure

This is the first time we have turned on this season and we have a BoAir replaceable air filter that I clean out every 45 days, will do again today to be sure it is clean, but I am fairly certain this has nothing to do with my filter.


Please advise,

Gary

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Sep 24, 2013
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starstarstarstarstar 		airconditioner noise NEW
by: joseph

hi the noise coming from the outside unit when it comes on that's caused from vibration and its loud thats all I can explain about the noise.metal noise coming from the shroud
Feb 09, 2012
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starstarstarstarstar 		help
by: Anonymous

is it the contacter
Jun 13, 2010
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starstarstarstarstar 		AC making Loud "buzz"
by: Rick H

the fan that cools the hot gas returning from the furnace is usally an AC voltage, capacitor start motor. based on the timing of your noise, it could be the capacitor is ready to fail. other than the noise, if your unit is working as expected, I would find the capacitor, it will be on or near the motor, there will be 2 or 3 wires connected to it and the motor and more than likely are spade clips that just slide together. **make sure your power disconnect is turned off** look for a negative/positive markings, numbers or letters, you want to reconnect the new one properly. Disconnect and take to an appliance parts store, for less than $50 will be a cheap attempt and more than likely your culprit.
May 28, 2010
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starstarstarstarstar 		check
by: Anonymous

Dear Gary,
Check whether it is sound of duct(only in case of ductable unit)
May 27, 2010
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starstarstarstarstar 		Central Ac made Buzz sound
by: Dadan

"After 1-3 seconds the noise stops and the blower kicks on."

So, it's not the blower that making that noise. Here to verify it. Turn your thermostat Fan from Auto to On. Does it makes that noise?



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