Neff
Compressor or Start Device Noise
Freezer makes loud humming or buzzing noise from compressor area.
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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
Failing compressor bearings, Start relay repeatedly trying to start a locked compressor, Vibrating refrigerant lines touching cabinet, Loose compressor mounting grommets
How to Fix / Troubleshooting
Safety: Unplug the freezer before touching the compressor or tubing. Components may be hot.
Steps:
- 1. Isolate vibration: Gently press on the cabinet panels and compressor area while the unit is running (use caution). If noise changes, look for loose panels or tubing touching metal.
- 2. Check mounting grommets: Inspect the rubber mounts under the compressor. Replace if cracked or missing.
- 3. Inspect start device: If you hear repeated clicking followed by a hum and then silence, the compressor may be locked or the start device faulty. Replace the start relay/PTC first.
- 4. Compressor diagnosis: If a new start device does not resolve the noise and the compressor overheats or fails to start, the compressor is likely failing and requires professional replacement.
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Repair Difficulty
Professional Required
5/5
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