Fisher & Paykel Freezers F2 Error: Freezer thermistor fault
Fisher & Paykel freezer error code F2 is a high-severity fault meaning Freezer compartment thermistor fault. A freezer thermistor fault means the controller cannot guarantee the compartment stays at or below 0°F (-18°C). Power-cycling will clear a transient F2 fault.
~50%
DIY Fixable
From $120
Typical Repair Cost
1–3 hrs
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
No. A freezer thermistor fault means the controller cannot guarantee the compartment stays at or below 0°F (-18°C). Frozen food safety is immediately at risk. Transfer all frozen items to an alternative freezer until the fault is resolved.
Can I reset the code?
Yes. Power-cycling will clear a transient F2 fault. If the code returns within one compressor cycle, the thermistor or wiring requires physical repair before the freezer can be trusted to maintain safe frozen-food temperatures.
When to stop immediately?
Stop if you notice: Frozen food shows any sign of thawing or partial defrost, Freezer temperature rises above 10°F (-12°C).
Symptoms You May Notice
F2 shown on display
The control panel shows F2 continuously or alternates the code with the current temperature reading.
Freezer not holding temperature
Frozen food begins to soften because the ActiveSmart controller cannot regulate the compressor without a valid sensor reading.
Compressor runs continuously
In some fault states the controller defaults to continuous compressor operation, causing excessive frost buildup and high energy consumption.
Possible Causes
Failed freezer thermistor
The NTC thermistor in the freezer compartment has failed open or short, returning a resistance value outside the controller's acceptance range.
DIY PossibleDamaged sensor wiring
Wiring from the freezer thermistor to the main PCB has been damaged by ice formation or contact with a shelf bracket.
DIY PossibleMoisture ingress at connector
Condensation or frost melt has entered the sensor connector, causing corrosion and intermittent resistance changes.
DIY PossibleControl board input failure
The main PCB thermistor input circuit has failed, producing a fault code even when the sensor itself is functioning correctly.
Requires ProfessionalSafe Checks You Can Do
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1
Power-cycle the unit
Disconnect power for 5 minutes, restore, and check whether F2 clears. Monitor freezer temperature for the next hour.
Note whether the code returns immediately or only after the unit runs for a period — this helps distinguish a transient fault from a permanent sensor failure.
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2
Check for frost buildup near the sensor
Inspect the freezer rear wall and evaporator cover for excessive ice that may be physically encasing the sensor probe.
Heavy frost around the thermistor can alter its reading. A manual defrost may temporarily clear the code if ice is the root cause.
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3
Inspect sensor and connector
After unplugging and allowing the freezer to reach room temperature, remove the evaporator cover and inspect the thermistor connector for moisture, corrosion, or loose pins.
Dry the connector thoroughly with compressed air and reseat it firmly before restoring power.
Tools required -
4
Test thermistor resistance
With the freezer unplugged, disconnect the thermistor leads and test resistance with a multimeter. Fisher & Paykel NTC freezer thermistors typically read near 30–50 kΩ at freezer operating temperatures.
An open-circuit (OL) reading or near-zero resistance confirms sensor failure. Replace the thermistor if out of range.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Thermistor is located behind the evaporator coil assembly, requiring care around refrigerant lines to access safely
- Code persists after confirmed thermistor replacement, indicating a control board input fault
- Ice maker also stops functioning alongside F2, suggesting broader electronic failure
Need Professional Help?
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