Whirlpool Refrigerator E5 Error Code — Cause, Fix & Parts | DecodeAppliance

Name: Whirlpool Refrigerator Defrost Thermostat
Brand: Whirlpool
SKU: WP4387503
Price: 20.44 USD

What's Happening

The E5 code means the defrost temperature sensor (bi-metal or NTC sensor clipped to the evaporator coils) has failed or is disconnected. This sensor tells the control board when the evaporator coils have reached the target defrost temperature (usually around 45°F/7°C) so the defrost heater can turn off. Without this signal, the defrost system either never activates (allowing massive frost buildup) or runs continuously (possibly overheating the coils). Either condition leads to a refrigerator that stops cooling properly.

How to Fix It

Unplug the refrigerator and remove the freezer back panel to access the evaporator coils. Locate the defrost sensor — it is clipped directly onto the coil tubing. Test resistance: a working NTC defrost sensor reads approximately 16,600 ohms at 32°F. Also check the bi-metal defrost thermostat (WP4387503) which is a separate device also clipped to the coils; it cuts power to the heater as a backup safety and can trigger E5 when it fails. Replace whichever component is out of spec.

Frequently Asked Questions

What does E5 mean on a Whirlpool refrigerator?

E5 means the defrost temperature sensor has failed. This sensor monitors evaporator coil temperature during defrost cycles. Without it, the defrost system runs incorrectly — either leading to heavy frost buildup or heater overrun.

How do I fix E5 on a Whirlpool refrigerator?

Remove the freezer back panel and access the evaporator coils. Test the defrost sensor with a multimeter and replace it if out of spec. Also inspect the bi-metal defrost thermostat (WP4387503) since both components work together and either can generate this code.

Will my refrigerator stop cooling with an E5 error?

Eventually, yes. If the defrost cycle is not running, frost will build up on the evaporator coils over days to weeks, gradually blocking airflow until the refrigerator stops cooling. You may notice this starting as the freezer cooling but the fridge section becoming warm.

How much does it cost to fix Whirlpool E5?

The defrost thermostat (WP4387503) costs $15–$35, and the defrost sensor is similarly priced. Most homeowners can access the evaporator coils with a screwdriver and complete the repair for under $50 in parts.

E5Whirlpool Refrigerator — Whirlpool Refrigerator E5 Error Code

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