F
Whirlpool Refrigerator
Severity:What Does This Error Mean?
The F error on a Whirlpool refrigerator indicates that the freezer compartment is not reaching or maintaining the correct temperature. The control board detected that the freezer is running too warm. This may be caused by a defrost system failure, a failed evaporator fan, a faulty thermistor, or a cooling system issue. Frozen food is at risk — act quickly to prevent loss.
Affected Models
- WRS325SDHZ
- WRT318FZDW
- WRB322DMBM
- WRF535SWHZ
- Common in Whirlpool top-freezer and side-by-side models
Common Causes
- Defrost system failure causing ice buildup that blocks evaporator airflow
- Failed evaporator fan motor not circulating cold air through the freezer
- Faulty freezer compartment thermistor sending incorrect temperature readings
- Compressor running inefficiently due to refrigerant loss or mechanical wear
- Door gasket failure allowing warm air to enter the freezer and raise temperature
How to Fix It
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Check the freezer temperature with a thermometer. Frozen food should be stored at 0°F (-18°C) or below.
If the temperature is above 10°F (-12°C), frozen food safety is at risk. Move food to another freezer while diagnosing.
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Listen for the evaporator fan inside the freezer. Open the freezer and listen for a quiet hum when the compressor is running.
If the fan is not running, remove the back panel inside the freezer to inspect the fan motor and check for ice blockage.
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Inspect the evaporator coil for heavy frost buildup. A solid block of ice on the coil means the defrost system has failed.
Manually defrost by unplugging the refrigerator for 24–48 hours with the doors open. If this clears the F error, the defrost system needs repair.
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Test the defrost heater and defrost thermostat with a multimeter for continuity. Replace any component that shows an open circuit.
The defrost heater is located on the evaporator coil and the defrost thermostat is clipped to the coil tubing.
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Test the freezer thermistor resistance and replace if out of specification. Clear the error code and monitor for 24 hours.
If F returns after addressing the defrost system and thermistor, the sealed refrigerant system needs professional diagnosis.
When to Call a Professional
Defrost heater or thermostat replacement is $50 to $120. Evaporator fan motor replacement is $50 to $150. Thermistor replacement is $20 to $60. If refrigerant is low (sealed system issue), a licensed technician is required — this is not a DIY repair.
Frequently Asked Questions
How long do I have before frozen food goes bad after an F error?
A full freezer stays cold for up to 48 hours if the door is kept closed. A half-full freezer stays cold for about 24 hours. Once the temperature rises above 40°F (4°C), start evaluating the food. Meat, seafood, and dairy should be discarded if they have thawed fully.
Can I manually defrost my Whirlpool freezer to fix the F error?
Yes, and it is often the right first step. Unplug the refrigerator and prop the freezer door open for 24–48 hours. This melts any ice blockage on the evaporator. If the F error clears after defrosting, the defrost system (heater, thermostat, or timer) needs repair to prevent recurrence.
Is the F error the same on all Whirlpool refrigerator models?
The F code meaning can vary slightly by model series. On most Whirlpool top-freezer and side-by-side models, F indicates a freezer temperature fault. Always check your specific model's service documentation for the exact definition. The model number is on a label inside the fresh food door frame.