Whirlpool · Refrigerator Moderate

F3 E8 — Whirlpool Refrigerator F3E8 — External Humidity (RH) Sensor Fault

F3E8 indicates a fault in the external humidity (RH) sensor on this Whirlpool-built platform; with the sensor failed, the anti-sweat 'flipper mullion' heater (between the French doors) typically runs at full power. It is not a water, ice, or filter problem — condensation or a warm door mullion is the usual real-world symptom.

Keep using it?
Yes, with caution
DIY difficulty
Moderate
Verified against
producthelp.whirlpool.com ↗

How to fix it

  1. Power-cycle the refrigerator (unplug ~5 minutes) to clear a transient fault.
  2. If F3E8 returns, the external humidity sensor/harness likely needs service.
  3. Contact Whirlpool service or an appliance technician with your model number. Do not replace water or filter parts for this code.

Why it happens

Typical signs: F3E8 shown on the display · Warm or sweating French-door mullion (the center divider) · Condensation around the door seam

  • External humidity (RH) sensor open or shorted The ambient humidity sensor that controls the anti-sweat mullion heater has failed.
  • Wiring/harness fault to the sensor An open or shorted connection mimics a failed sensor.

Replace your water filter

A clogged or overdue water filter is a common cause of low water and ice flow on Whirlpool refrigerators — they are meant to be changed about every 6 months. The OEM-style filter that fits most Whirlpool refrigerators is the EDR1RXD1 ($40-50 OEM, $15-25 compatible).

  • Whirlpool EDR1RXD1 refrigerator water filter OEM water filter
    Amazon →

Not sure which filter fits your model? See the full compatibility guide →

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 E1 F3 E1 — Fresh Food 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.