Zanussi
Unstable Temperature Control
Freezer temperature fluctuates widely; sometimes too warm, sometimes too cold.
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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
Drifting NTC sensor, Intermittent wiring connection, Faulty electronic thermostat, Power supply instability on control PCB
How to Fix / Troubleshooting
Safety: Unplug before working on wiring or control boards.
- Monitor with thermometer: Place an accurate thermometer inside and log temperature over 24 hours to confirm fluctuations.
- Wiggle test wiring: With power off, gently move the sensor harness and connectors to detect any loose or intermittent connections.
- Replace sensor: If in doubt, replace the freezer temperature sensor as it is relatively inexpensive and commonly causes erratic control when drifting.
- Replace control board: If fluctuations persist, the main control PCB may have unstable regulation and should be replaced.
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Repair Difficulty
Medium
3/5
Required Part
Freezer Temperature Sensor (NTC)
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