Summit
Overcooling / Thermostat or Sensor Out of Calibration
Freezer interior is too cold; items are rock-hard and ice crystals form on packaging even at higher settings.
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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
Stuck-closed mechanical thermostat (on analog models), Shorted cabinet thermistor, Control board not cycling compressor off
How to Fix / Troubleshooting
Safety first: Unplug the freezer before accessing the thermostat or control board.
Steps to correct overcooling:
- Adjust temperature control: Set the control to a warmer setting and monitor for 24 hours. If no change, suspect a control fault.
- For mechanical thermostat models: Locate the thermostat behind the temperature knob. Remove the knob and mounting screws, then gently pull out the thermostat. Inspect the sensing bulb/capillary for kinks or damage.
- Test thermostat: With a multimeter, check continuity across the thermostat terminals while slowly turning the knob. It should open and close as the setting changes. If it remains closed, replace it.
- For electronic models: Test the cabinet thermistor as described in the E1 procedure. A shorted sensor will read very low resistance and cause overcooling.
- Replace faulty component: Install a Summit-compatible thermostat or thermistor as needed. Reassemble and verify that the compressor now cycles off periodically.
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Repair Difficulty
Medium
3/5
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