AC compressor making weird sounds after servicing
Using coil spray and water to clean an outdoor unit can leave the compressor making strange buzzing sounds, particularly when temperatures climb above 85 degrees. This leaves homeowners anxious and unsure whether the post-maintenance noise is something they should actually worry about.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
Found another way around this?
Share your steps and trade-offs so fellow engineers don't have to reinvent the wheel. No account required.
AC compressor making weird sounds after servicing
- 1Turning off the unitDid this help you?
- 2Calling an HVAC technicianDid this help you?
- 3Checking if the condenser coil is dirtyDid this help you?
- 4Comparing the sound to other units heard in the neighborhoodDid this help you?
- 5checking system pressuresDid this help you?
- 6pinpointing the location of bearing failureDid this help you?
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“yes there’s a clutch. it’s hard to tell in the video but the compressor was getting stuck for like 1/4 of a second repeatedly”source ↗
“yeah low side was sitting around 50 psi and high side around 180 i only put in one can so 340 grams”source ↗
Where this came up
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