Sub-Zero Short Cycling – Control or Load Issue

Wine cooler cycles on and off frequently; compressor starts and stops more often than expected.

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.

Possible Causes

Oversensitive temperature differential, Faulty thermistor, Poor door seal causing frequent warm air infiltration, Control board relay issue

How to Fix / Troubleshooting

Safety first: Disconnect power before accessing sensors or control boards.

Step 1 – Check door usage and seal

Reduce frequent door openings.
Inspect and replace any damaged door gasket.

Step 2 – Verify temperature stability

Use a thermometer to monitor cabinet temperature over several hours.
If temperature swings are small but cycling is frequent, the control differential may be tight.

Step 3 – Inspect thermistor

Replace the compartment thermistor if readings are erratic.

Step 4 – Control board

If short cycling persists, the control board may have a relay or logic issue and should be evaluated by a technician.

Repair Difficulty

Medium 3/5

Required Part

Compartment Thermistor

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