Fisher & Paykel Freezers F5 Error: Condenser thermistor fault
Fisher & Paykel freezer error code F5 is a mid-severity fault meaning Condenser temperature thermistor fault. The freezer compartment continues to cool normally with an F5 fault, but efficiency is reduced. A power-cycle will clear a transient F5 fault.
~65%
DIY Fixable
From $90
Typical Repair Cost
30–60 min
Pro Repair Time
Quick Assessment
Answer to continue safely
Is it safe to keep using?
Yes. The freezer compartment continues to cool normally with an F5 fault, but efficiency is reduced. Food safety is not immediately at risk. Schedule repair within a few days to avoid increased energy consumption and risk of compressor overheating over time.
Can I reset the code?
Yes. A power-cycle will clear a transient F5 fault. If the code returns, the condenser thermistor or its wiring requires physical inspection and likely replacement.
When to stop immediately?
Stop if you notice: F5 appears alongside FF (compressor overload), indicating the machine compartment is genuinely overheating, F5 appears alongside multiple other fault codes simultaneously.
Symptoms You May Notice
F5 code on display
The control panel shows F5, indicating the controller cannot get a valid reading from the condenser or machine-compartment temperature sensor.
Compressor runs longer cycles
Without condenser temperature feedback, the ActiveSmart controller cannot optimize compressor run time for ambient heat rejection, resulting in extended run cycles.
Machine compartment warmer than normal
The condenser fan may run continuously at full speed as a precaution, but the overall heat rejection is still less efficient without sensor data.
Possible Causes
Failed condenser thermistor
The NTC sensor monitoring the condenser or machine compartment temperature has failed open or short.
DIY PossibleLoose or corroded connector
The wire harness connecting the condenser thermistor to the main PCB has worked loose or corroded, breaking the signal path.
DIY PossibleDust-insulated sensor
Heavy dust accumulation around the sensor in the machine compartment has caused it to read an out-of-range temperature value.
DIY PossibleMain PCB input fault
The thermistor input circuit on the main control board has failed, returning a fault even with a good sensor.
Requires ProfessionalSafe Checks You Can Do
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1
Power-cycle the freezer
Unplug for 5 minutes, restore power, and check whether F5 clears. Condenser thermistor faults are sometimes transient.
If F5 clears on reset and does not return, no further action is required immediately, but monitor for recurrence.
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2
Clean condenser area
Remove the base toe-kick grille and vacuum the condenser coils and machine compartment, paying attention to the sensor body. Thick dust can insulate the sensor and cause erroneous readings.
Clean condenser coils annually to prevent both F5 and compressor overheating faults.
Tools required -
3
Inspect and reseat sensor connector
With the unit unplugged, locate the condenser thermistor (typically clipped to the condenser tubing or fan shroud) and check the connector for corrosion or loose fit. Reseat firmly.
Test sensor resistance with a multimeter at room temperature. Compare to the expected value in the service documentation.
Tools required
When to Call a Professional
Contact a qualified technician if:
- Code persists after confirmed sensor replacement, indicating a PCB input fault
- F5 appears alongside FF repeatedly, suggesting a systemic overheating problem in the machine compartment
Need Professional Help?
Find qualified technicians in your area for proper diagnostics and repair.
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