Ambient sensor error — room temperature sensor malfunction detected
The E4 error on the Whirlpool WRS325SDHZ indicates ambient sensor error — room temperature sensor malfunction detected. This typically occurs due to failed ambient air temperature thermistor. Most homeowners fix this in 5–10 min by following the steps below.
Common Causes of E4
- 1Failed ambient air temperature thermistor
- 2Loose wiring at the ambient sensor connector
- 3Control board sensor input circuit fault
- 4Sensor placed in a location with extreme temperature fluctuations
How to Fix E4
- 1
Step 1
Unplug the refrigerator for 5 minutes to reset the control board
- 2
Step 2
Plug the refrigerator back in and verify that the cooling functions are working normally
- 3
Step 3
Confirm the refrigerator is not placed in a location with extreme temperature variation such as an unheated garage
- 4
Step 4
Monitor refrigerator performance over 24 hours before concluding the sensor has failed
- 5
Step 5
Call a technician if the E4 error reappears — the ambient thermistor or its harness needs testing and possible replacement
Tools Needed
When to Call a Technician
E4 error returns and refrigerator is located in a normal temperature environment — ambient sensor replacement needed
Frequently Asked Questions
Common questions about Whirlpool E4 error
The E4 error on the Whirlpool WRS325SDHZ means the ambient air temperature sensor is malfunctioning. The refrigerator uses the ambient sensor to adjust its cooling output based on room temperature. A faulty sensor can cause the fridge to run less efficiently, though it rarely causes immediate food safety concerns.
Yes. Placing the refrigerator in a very hot (above 110°F) or very cold (below 35°F) environment can cause the ambient sensor to read values outside its designed range, triggering the E4 error. Most Whirlpool refrigerators are rated for ambient temperatures between 55°F and 110°F. Moving the unit to a conditioned space may resolve the error.
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