E3
Whirlpool Refrigerator
Severity: ModerateWhat Does This Error Mean?
The E3 error on a Whirlpool refrigerator indicates a problem with the defrost sensor or defrost heater circuit. The defrost system melts ice buildup on the evaporator coils every few hours. If the sensor or heater fails, ice builds up on the coils and blocks airflow. Your refrigerator may slowly warm up if this is not addressed.
Affected Models
- WRF535SWHZ
- WRS325SDHZ
- WRF767SDHZ
- WRT318FZDW
- Most Whirlpool French door and side-by-side refrigerators
Common Causes
- The defrost temperature sensor (also called the defrost limiter) has failed
- The defrost heater has burned out and is no longer melting ice off the evaporator coils
- The wiring between the defrost components and the control board is damaged or loose
- The main control board has failed and is incorrectly triggering the E3 code
- Excessive ice buildup has damaged or displaced the defrost sensor
How to Fix It
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Unplug the refrigerator and remove all food. Leave it unplugged with the doors open for 24 to 48 hours to fully defrost all ice buildup on the evaporator coils.
Place towels around the base to catch melting water. This manual defrost sometimes clears E3 if the sensor was frozen in place.
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After defrosting, plug the refrigerator back in. If E3 does not return within 24 hours, the defrost sensor may have been stuck due to ice and is now functioning again.
If E3 returns within a day or two, the defrost heater or sensor has failed and needs replacement.
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Access the evaporator coils (typically in the freezer behind the back wall panel). Check the defrost heater — it is a coiled wire element around the coils. Test it with a multimeter for continuity. No continuity means it has burned out.
Defrost heaters cost $20–$60 and are a manageable DIY repair on most Whirlpool models.
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Test the defrost temperature sensor. It should show specific resistance at specific temperatures (check your model's service manual for values). An out-of-spec reading means it needs replacement.
Defrost sensors (also called defrost limiters or bi-metal thermostats) typically cost $10–$25.
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If both the heater and sensor test correctly, the main control board may be faulty. Control boards are expensive to replace — have a technician confirm this diagnosis before ordering one.
Control board replacement typically costs $150–$350 for parts plus labor.
When to Call a Professional
If manual defrosting clears the error temporarily but E3 returns, the defrost components need testing. A technician can use a multimeter to check the heater and sensor. Defrost heater replacement is a moderate DIY repair. Control board issues should be diagnosed and repaired by a professional.
Frequently Asked Questions
Why does ice build up on the evaporator coils?
The evaporator coils get very cold to cool the refrigerator. Moisture in the air freezes on them during normal operation. The defrost cycle runs automatically every 6 to 12 hours to melt this ice. If the defrost heater or sensor fails, the ice is never melted and keeps building up. Eventually, the thick ice layer blocks airflow and the refrigerator stops cooling.
Will E3 cause my food to spoil?
It can over time. If the defrost system fails completely, ice will gradually block the evaporator coils. Reduced airflow means the refrigerator eventually stops cooling. This can take a few days to a few weeks depending on how much humidity is in the air. Don't delay — address E3 promptly.
How often should a refrigerator defrost cycle run?
Most Whirlpool refrigerators run an automatic defrost cycle every 8 to 12 hours. Each defrost cycle lasts about 20 to 30 minutes. You may hear a soft hissing or trickling sound during defrost — this is normal. If the refrigerator never runs a defrost cycle, ice will build up and trigger E3.