Grünbeck
Drive Motor / Gear Train Noise
Unit makes loud clicking or grinding noises during regeneration
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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 gear teeth, Lack of lubrication in gear train, Foreign object in valve head, Misaligned cam or piston
How to Fix / Troubleshooting
Safety: Disconnect power before opening the valve head or control housing.
- Localize noise: Listen carefully to determine whether the noise comes from the motor/gearbox area or from the hydraulic valve.
- Inspect gears: Remove the control cover and inspect the plastic gears for wear or broken teeth. Replace damaged gears or the complete drive assembly.
- Lubricate: Apply a thin layer of food-grade grease to the gear teeth and cam surfaces if they appear dry.
- Check for obstructions: Inspect the valve piston and channels for resin beads or debris that could cause mechanical resistance and noise.
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Repair Difficulty
Medium
3/5
Required Part
Drive Motor and Gear Train
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