Whirlpool Refrigerator Error E1: Temperature Sensor Fault

The Logic Verdict

My Take: Whirlpool calls E1 a temperature sensor communication fault. The video shows exactly what to check: reset power, inspect the thermistor harness, ohm the sensor (≈2 kΩ at room temp), and replace it if the reading is out of range. Start with the sensor before condemning the control board.

What It Means

E1 = Temperature Sensor Communication Error. The control board is not getting a valid resistance signal from the thermistor in the fresh food or freezer section.

Common Causes

1. Failed Thermistor: Open or shorted temperature sensor.
2. Damaged Harness: Loose or corroded pins between the sensor and board.
3. Ice Buildup: Frost encasing the sensor and skewing readings.
4. Control Board Fault: Rare—only after sensor and wiring are verified good.

Step-by-Step Fix

1. Power Reset: Unplug the fridge (or kill the breaker) for 5 minutes to clear software glitches.
2. Inspect the Sensor: Locate the thermistor (often clipped to the liner). Check for ice buildup or broken clips.
3. Check Wiring: Make sure the harness is fully seated at both the sensor and control board. Look for frayed or pinched wires.
4. Test Resistance: With the fridge unplugged, disconnect the thermistor and measure resistance. Expect roughly 2 kΩ at 77 °F. Compare to the thermistor chart in the tech sheet.
5. Replace if Needed: If the reading is out of spec or jumps around when you move the wires, install a new thermistor. Only suspect the control board if a new sensor tests good but E1 persists.

Resources

• Whirlpool Refrigerator Thermistors (Amazon)
• Digital Multimeters for Appliance Repair (Amazon)