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.
Found another way around this?
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Grinding sound when turning off a new HVAC unit
- 1Called the HVAC techDid this help you?
- 2continuing to drive while unsure of the causeDid this help you?
- 3asking online for sound diagnosisDid this help you?
- 4landlord claims it is normal operationDid 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.
“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 ↗
“The Taco Zone Sentry valve in my bedroom grinds loudly every time the heat cycles. It's quite annoying, especially at night when I'm trying to fall asleep.”source ↗
Where this came up
People with this problem also raised
- 2Car squeaks and shudders when stopped at a light
- 4Why does my truck make a rattling noise after I turn it off?
- 5Why does my car make a clunking noise under load or when turning?
- 7Car makes whirring noise that stops when I press the clutch
- 12Car making weird noises after getting serviced
- 8Why is my AC making a loud noise after changing thermostats?