F3
AEG
Temperature Sensor Calibration / Range Error
Freezer displays F3 and may show very high or very low temperature readings
Advertisements
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.
Advertisements
Possible Causes
Incorrect NTC type fitted previously, Sensor partially damaged giving wrong resistance curve, Poor contact in sensor connector, PCB ADC (analog-to-digital converter) fault
How to Fix / Troubleshooting
Safety: Unplug the freezer before testing components.
Steps:
- 1. Confirm correct part: Check the part number on the installed NTC against the AEG parts list for your exact model. Replace if it is not the specified type.
- 2. Measure resistance at two temperatures: Place the sensor tip in ice water (~0°C) and then at room temperature (~20°C), measuring resistance each time. Compare to AEG's NTC curve. Large deviations indicate a faulty sensor.
- 3. Inspect connector: Clean and reseat the sensor connector at both ends. Look for bent pins or corrosion.
- 4. Replace sensor: If in doubt, fit a new genuine AEG sensor and retest.
If F3 persists with a known-good sensor, the main PCB may be misreading the signal and should be evaluated by a professional.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Freezer Temperature NTC Sensor
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements