Wellis
Seized Pump Motor or Blocked Impeller
Loud humming from the pump, but little or no water movement.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Debris lodged in the impeller; failed pump bearings; swollen shaft seal; low voltage causing motor stall.
How to Fix / Troubleshooting
Safety first: Turn off power at the breaker before touching the pump.
- 1. Check for air lock:
- Bleed the pump unions to remove air as described in air lock procedures.
- 2. Inspect pump mechanically:
- With power OFF, try to rotate the motor shaft by hand (via the rear fan or coupling).
- If it is stiff or locked, the pump likely needs rebuilding or replacement.
- 3. Check for obstructions:
- Remove the pump wet end (technician) and inspect the impeller for debris.
- 4. Electrical checks (qualified person):
- Verify correct voltage at the pump terminals.
- 5. Replace pump if seized: Install a Wellis-compatible replacement pump if the motor is seized or bearings have failed.
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Repair Difficulty
Hard
4/5
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