If your pool pump suddenly sounds different than usual, it’s worth paying attention. Unusual noises coming from your pool equipment pad often indicate a developing issue. The good news is that some causes are simple to identify and fix.
Below are several steps homeowners can take to determine whether the noise is a minor issue or something that requires professional service.
1. Look for Air Bubbles in the Pool
Start by observing the return jets in your pool. If you see air bubbles coming out, air is entering the system on the suction side of the equipment (anything before the pump).
Check the following:
- Pool water level should be about halfway up the tile line
- Skimmer openings should have steady water flow without gurgling sounds
- Skimmer weirs should move freely
Low water level or restricted skimmer flow is one of the most common causes of pump noise.
2. Check for Debris in Skimmers and Pump Basket
Leaves and debris can restrict water flow, forcing the pump to work harder and sound different.
- Clear debris from skimmer baskets
- Turn off the pump and clean the pump basket (pump pot)
- Ensure the pump lid is seated properly before restarting
Restricted flow often causes whining, cavitation, or rattling noises.
3. Inspect for Water Leaks at the Equipment Pad
While the pump is running, look for water leaking from the pump lid or nearby fittings.
- Dripping water may indicate a worn or dry pump lid O-ring
- O-rings may need lubrication or replacement
Next, turn off the pump and watch closely:
- If water leaks out immediately after shutoff, a bad O-ring or valve seal may be allowing air into the system
4. Check the Filter Pressure
High filter pressure puts added strain on the pump motor and can cause unusual noise.
- Check the pressure gauge on top of the filter
- If pressure is 8–10 PSI higher than clean pressure, the filter needs cleaning or backwashing
If you’re unsure of the clean pressure, observe pool circulation—slow or weak flow usually indicates a dirty filter.
5. Worn or Failing Motor Bearings
If you’ve checked all the steps above and the noise persists, the pump motor bearings may be failing.
Common signs include:
- Grinding, screeching, or metallic noises
- Noise that gets worse over time
Unfortunately, bad motor bearings typically require a motor replacement rather than a repair.
When to Call a Professional
If you’re unsure why your pool pump is making a strange noise—or want to prevent a small issue from becoming a costly failure—professional diagnosis is the safest option.
Contact Pool Genius to schedule a service call. Our technicians can identify the issue and provide clear repair or replacement options to keep your pool running smoothly.
GET IN TOUCH