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Old 11-29-2018, 04:00 PM   #1
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Default AC noise

the AC unit in my salon work's fine but when i switch it to heat it works but makes a noise any idias

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Old 11-29-2018, 04:13 PM   #2
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Is it a chunka, chunka, chunka? Or more of a boing, boing, boing?

Maybe you could elaborate on the noise?
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Old 11-29-2018, 07:53 PM   #3
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or a grr grr grr maybe
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Old 11-30-2018, 03:25 AM   #4
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Interesting that in AC mode it doesnít make this noise but when in heat mode it does. A reverse cycle heat is basically a heat pump so the only difference is the flow of the Freon is reversed.

As asked what does it sound like?

Can you trace the sound to a spefic component in the system?
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Old 12-04-2018, 02:53 PM   #5
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Quote:
Originally Posted by mmwjr View Post
Interesting that in AC mode it doesnít make this noise but when in heat mode it does. A reverse cycle heat is basically a heat pump so the only difference is the flow of the Freon is reversed.

As asked what does it sound like?

Can you trace the sound to a spefic component in the system?
it is like a grr grr grr
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Old 12-05-2018, 12:16 PM   #6
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it is like a grr grr grr
That sounds like a blower motor but that would be running in heat and AC modes. You should be able to find out the source by seeing which component is making the noise.
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Old 12-05-2018, 02:52 PM   #7
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I think that the fan is a variable speed motor and steps up or down for heat and AC. The bearings might be going on the fan and at different speeds you might be getting a different sound. Like some weird harmonic resonance at just the right speed.
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Old 12-05-2018, 04:12 PM   #8
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Actually it was me making the noise

I agree it may be the fan at a lower speed.
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