Heat PumpTroubleshooting2026-02-12
Heat Pump Making Noise: What's Normal?
Whooshing and clicking are normal; grinding, screeching or buzzing are not.
Heat pumps make operating sounds, but certain noises signal trouble. Here's how to tell them apart.
Normal sounds
A whoosh at start-up, clicking as it changes modes, and a brief rush during defrost are all normal heat pump sounds.
Concerning sounds
Grinding (bearings), screeching (motor/compressor), loud buzzing (electrical), or rattling (loose parts/debris) warrant shutting down and calling for service.
Key takeaways
- Whoosh and clicking are normal
- Grinding/screeching = shut down and call
- Buzzing can be electrical — get it checked
- Clear debris from the outdoor unit
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