Unbearable Noise From Trane Mini Split - HVAC - DIY Chatroom Home Improvement Forum
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Old 08-03-2020, 01:01 AM   #1
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This Trane mini split HVAC makes this very loud buzzing/drilling/alarm type of noise intermittently, with variable amounts of time in between each “buzz,” but at least once every 4-5 minutes, lasting for a few seconds! Sometimes it will do it every minute; in fact, one time it interrupted itself while still buzzing so that it could start buzzing again! It even makes the noise when the unit is turned off!! Here is a video of the noise happening:

I would like to get as many opinions on this as possible and what the possible cause could be. Please tell me it’s not the normal operation of the unit, as a maintenance guy claimed! I don’t see how Trane could keep selling these things if that’s the case...who could ever sleep with that loud alarm going off every 4 minutes???!!

Last edited by JJ22334455; 08-03-2020 at 01:27 AM.
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Old 08-03-2020, 04:14 AM   #2
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Re: Unbearable Noise from Trane Mini Split


Sounds like a relay on the board. Could be bad board, or a loose wire connection.


Go to your landlord/apt rental office, and play that vid for them. Then maybe they get someone out that knows how to work on them.
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Old 08-03-2020, 11:46 AM   #3
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Re: Unbearable Noise from Trane Mini Split


Open the cover, see if you can see something in there.
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Old 08-03-2020, 05:58 PM   #4
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Re: Unbearable Noise from Trane Mini Split


It seems like the noise happens when the damper on the bottom tries to move up. Is there an option on the remote to stop that from moving to see if the noise is coming from that little motor that turns it?
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