F05Serious
Whirlpool Refrigerator F05 Error Code
The defrost heater circuit is not functioning, causing frost buildup in the freezer.
Common causes
- Open defrost heater
- Faulty defrost thermostat
- Defrost control board failure
How to fix it
- Check for frost buildup in freezer
- Test defrost heater continuity with multimeter
- Inspect defrost thermostat for continuity
⚠ When to call a pro: If you are not comfortable testing electrical components, call a technician.
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Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.