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re: Our outside AC unit sounds like a generator running
Posted on 4/26/23 at 1:30 pm to couyon2
Posted on 4/26/23 at 1:30 pm to couyon2
The sound could be compressor knock. When I had that very loud noise, the HVAC tech found that the system had way too high coolant pressure. Reducing pressure helped a little. It was still so loud at night that I finally bought a new unit. Good luck.
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