BWT Perla
Valve Head Mechanical Noise
BWT Perla is noisy during regeneration (loud clicking, grinding, or humming)
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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
Worn or damaged gear train, Rotor disc rubbing due to debris, Motor struggling against high friction, Air in lines causing cavitation noise
How to Fix / Troubleshooting
Safety first: Unplug the unit and close valves before opening the valve head cover.
- Identify noise source: Start a manual regeneration and listen carefully to locate whether the noise comes from the motor/gear area or from water flow.
- Check for air: Ensure the inlet line is fully purged of air and that there are no suction points upstream that could introduce air.
- Inspect gears: Remove the valve head cover and inspect the plastic gears for wear, missing teeth, or misalignment.
- Clean rotor area: Check for debris or scale around the rotor disc and seals. Clean gently without scratching sealing surfaces.
- Replace valve head: If gears are damaged or the rotor is excessively worn, replace the complete valve head assembly.
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Repair Difficulty
Hard
4/5
Required Part
Valve Head Assembly
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