Dometic
No Cooling / Cooling System Not Starting
Wine cooler not cooling at all; interior light works but no cold air, compressor or Peltier module silent.
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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
Failed main control PCB, defective compressor start relay or Peltier module, open thermal fuse on cooling circuit, faulty temperature sensor preventing start
How to Fix / Troubleshooting
Safety: Unplug the unit before testing components. Use caution around live circuits if voltage tests are performed by a qualified person.
Steps:
- Confirm power: Verify that the outlet is live and correctly wired. Check the unit's power cord and plug for damage.
- Listen for operation: After plugging in briefly, listen for any hum or vibration from the compressor or Peltier module. If completely silent, unplug and continue diagnosis.
- Inspect control board: Remove the rear or top panel to access the main control PCB. Look for burnt components or blown tracks.
- Check thermal devices: Test any inline thermal fuses or overloads on the cooling circuit for continuity. Replace if open.
- Test start device or module: For compressor models, test the start relay/PTC. For thermoelectric models, measure resistance of the Peltier module. Replace faulty parts.
- Replace control board: If the cooling components are good but the board does not supply power, replace the main control PCB.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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