Whirlpool · Refrigerator Serious

F3 E1 — Fresh Food Thermistor Fault

The main control detected an open or shorted fresh food compartment temperature sensor (thermistor). With no valid reading, the fridge cannot regulate cooling correctly and may run constantly or not cool at all.

Keep using it?
Limited use only
DIY difficulty
Moderate
Verified against
producthelp.whirlpool.com ↗

How to fix it

  1. Unplug the refrigerator for 5 minutes and restore power. If F3 E1 returns, continue diagnosis.
  2. Locate the fresh food thermistor (usually clipped near the top rear of the fresh food compartment behind a cover).
  3. Disconnect the sensor and read resistance with a multimeter — should be about 10kΩ at room temperature (~77°F).
  4. If resistance is open, near zero, or wildly off, replace the thermistor.
  5. If the sensor reads correctly, inspect and reseat the connector at the main control board on the back of the cabinet.
  6. If wiring and sensor both check good, replace the main control board.

Why it happens

Typical signs: Flashing 'F' on display · Fresh food too warm or too cold · Compressor runs continuously or short-cycles · Temperature display will not adjust

  • Failed fresh food thermistor The 10kΩ NTC sensor has drifted out of range or gone open-circuit.
  • Loose or corroded harness connector Connector to the sensor at the control board has worked loose.
  • Pinched/cut sensor wire Wire was crushed during a drawer slide or shelf install.

Parts you may need

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Refrigerator thermistor (fresh food) Common replacement
    Amazon →

More Whirlpool refrigerator codes

6 (flashing) Flashing 6 — 6th Sense Active CF CF — Communication Failure Co Co — Cooling Off / Demo Mode dF dF — Defrost System Failure Er Er — Generic Error / Control Glitch F3 E2 F3 E2 — Freezer Thermistor Fault

All Whirlpool codes → All refrigerator codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: producthelp.whirlpool.com.