Blomberg
Mechanical Noise / Vibration
Microwave is excessively noisy during operation (rattling, grinding, or scraping sounds).
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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 under turntable or roller ring,Worn turntable motor,Loose cooling fan or fan shroud,Loose mounting screws on internal components
How to Fix / Troubleshooting
Safety: Unplug the microwave before internal inspection. Avoid touching high-voltage parts.
User checks:
- 1. Remove and clean: Take out the glass tray and roller ring. Clean them and the cavity floor. Check for small objects or food debris.
- 2. Test without tray: Run the microwave briefly (10–15 seconds) without the tray to see if the noise changes. Do not run for long without a load.
Advanced steps:
- 3. Inspect fan: Remove the cabinet and check the cooling fan for loose blades or obstructions.
- 4. Tighten hardware: Check mounting screws on the transformer, magnetron, and fan assembly. Tighten as needed.
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Repair Difficulty
Medium
3/5
Required Part
Cooling Fan Assembly
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