Certikin
Worn Motor Bearings
Pump is very noisy, with a grinding or rumbling sound that gets louder over time.
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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
Age‑related bearing wear, water ingress through failed seal, misalignment, excessive belt tension (if belt‑driven auxiliary equipment is attached)
How to Fix / Troubleshooting
Safety: Isolate power before touching the motor.
- Confirm bearing noise: Use a mechanic's stethoscope or a long screwdriver against the motor body to localize the noise. Bearing noise is typically a rough, grinding sound.
- Check for leaks: Inspect for signs of water ingress at the motor end bell, which may indicate a failed mechanical seal.
- Plan replacement: Bearings can be replaced by a motor repair shop, but in many cases it is more economical to replace the complete Certikin motor assembly.
Do not continue to run the pump with noisy bearings, as failure can lead to rotor damage and seizure.
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Repair Difficulty
Hard
4/5
Required Part
Certikin pump motor assembly
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