Zanussi
Temperature Regulation / Calibration Fault
Electric oven heats but temperature is significantly too high or too low compared to the set temperature.
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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
Aged or drifting temperature sensor, faulty thermostat (mechanical models), control board calibration error, poor door seal causing heat loss
How to Fix / Troubleshooting
Safety first: Allow the oven to cool before internal inspection.
- Verify with thermometer: Place an oven-safe thermometer in the center of the oven and compare actual temperature to the set temperature over several cycles.
- Inspect door seal: Check the door gasket for gaps, tears, or compression. Replace if damaged to prevent heat loss.
- Check sensor position: Ensure the temperature sensor probe is not touching the oven wall and is firmly mounted.
- Replace sensor or thermostat: If readings are consistently off by a large margin, replace the NTC sensor (electronic models) or thermostat (mechanical models). Some electronic controls allow calibration adjustment in the settings menu; refer to the user manual.
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Repair Difficulty
Medium
3/5
Required Part
Oven Thermostat / Temperature Sensor
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