Noise and vibrations in heat pumps: when they are normal and when they are not

The heat pump changes speed and load, so noise levels can vary. However, new or intense vibrations require inspection.

Potential causes

Fan, ice, loose mounts, piping transmitting vibrations, or compressor operation at high load.

During defrost

Sound changes may be normal due to the four-way valve and pressure changes.

Inspection

Identify the source of the noise before any mechanical intervention is performed.