Grinding sound when turning off a new HVAC unit
A brand new HVAC unit often makes a grinding noise at shutdown that leaves homeowners questioning if it is normal. This unexpected sound creates immediate worry over a fresh installation and leaves owners unsure whether to trust the technician's reassurance or demand a service check.
What people tried
Every workaround mentioned in the threads below. We haven’t tested any of them — and nobody here is claiming they worked.
- 1Called the HVAC tech
- 2continuing to drive while unsure of the cause
- 3asking online for sound diagnosis
In their words
Unedited, grouped by where they were said, most upvoted first within each place, each linked to the thread it came from.
“im hearing this funny clanking sound and am jot sure if its ok to continue driving. When the car is in neutral its louder but whne i drive it gets quieter”source ↗
“Got a new 4 ton unit installed a few days ago and when it turns off it makes this grinding sound every time.”source ↗
Where this came up
People with this problem also raised
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- 20Why does my car run terribly and stutter after a long drive?
- 2Why does my car make a clicking noise and not start?