Noisy pool heat pump: causes and fixes
Updated : · Piscines VP
A heat pump makes two sounds: the fan (airflow) and the compressor (hum). Noise that increases often comes from loose parts, a dirty or unbalanced fan, an unlevel base or a unit right against a wall. Keep the heat pump level, clear, clean, on its anti-vibration feet, and have any metallic noise checked.
The pool heat pump is often the loudest equipment in the yard. Some of that noise is normal; the rest can be fixed.
Normal sounds
- The fan’s airflow, steady.
- The compressor’s hum, lower-pitched.
- A light click at start and stop.
Sounds to watch
| Sound | Likely cause | What to do |
|---|---|---|
| Vibration that shakes the slab or a wall | Unit not level, touching a surface, worn feet | Re-level, clear, check the feet |
| Noise increasing over the years | Dirty or unbalanced fan, loose screws | Clean the fins, have it checked |
| Metallic scraping | Fan blade touching, loose part | Turn it off, call for service |
| Hissing | Possible refrigerant issue | Call a certified technician |
Location matters a lot
- Not against the house or the neighbour’s fence: those surfaces amplify sound.
- The fan shouldn’t blow toward a bedroom window or the neighbour.
- Clearance around the unit as specified by the manufacturer: a heat pump short of air works harder and gets louder.
- Check the distances required by your municipality.
And the filter pump?
The heat pump needs the pump’s flow. A noisy pump next to a heat pump can double the problem. See Noisy pool pump.
Piscines VP installs and services heat pumps in Laval and the Basses-Laurentides, Quebec.
Frequently asked questions
Is it normal for a heat pump to be louder than a pump?
Yes: it has a compressor and a large fan. Manufacturers often list a sound level in decibels in the spec sheet; compare it before buying.
Does SOURDINE work under a heat pump?
No. SOURDINE is designed for pool pumps. A heat pump should be installed according to its manufacturer's instructions, often with its own anti-vibration feet.
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