Vestfrost
Single-Zone Cooling Failure in Dual-Zone System
Dual-zone wine cooler: one zone cools correctly while the other is warm or unstable.
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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
Zone-specific NTC sensor failure, Faulty air damper or fan between zones, Partial blockage in dual evaporator system, Zone relay failure on PCB
How to Fix / Troubleshooting
Safety first: Unplug the cooler before accessing internal panels or the control board.
Steps to check and fix:
- 1. Compare zones: Verify setpoints and actual temperatures in both zones with separate thermometers.
- 2. Check zone sensor: Test the NTC sensor for the affected zone and replace if out of specification.
- 3. Inspect inter-zone fan or damper: On models that share cooling between zones, check the fan or motorized damper that directs air to the affected zone. Ensure it operates and is not blocked.
- 4. PCB outputs: If the hardware is good, the zone control relay or triac on the main PCB may have failed. Replace the main control PCB if necessary.
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Repair Difficulty
Hard
4/5
Required Part
Zone Air Circulation Fan / Damper
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