Code: F6 E1🧊 Whirlpool Refrigerator

Whirlpool Refrigerator F6 E1 (F6E1): Display and Main Control Not Communicating (Meaning, Causes, Fixes)

Reviewed 2026-10-23 · Based on 4 manufacturer & service sources

What the code means

Whirlpool's own refrigerator tech sheet W11446054 lists F6E1 under "Communication System" as "Comm Failure Between ACU 1 and HMI 1." The ACU (appliance control unit) is the main control board that runs the compressor, fans and heaters; the HMI (human-machine interface) is the display and buttons you use to set temperatures. When the two lose their data link, the display can't send settings to the main board or show what it's doing. Whirlpool's consumer Product Help page for F6 E1 (bottom-freezer and French-door models) doesn't spell out the meaning; it just calls it a flashing "F" code and gives a power reset. On some older Whirlpool-built refrigerators with separate fridge and freezer displays, Sears PartsDirect lists the same kind of failure as "CF" on the freezer display.

Likely causes

Safe DIY checks

⚠ Before you start

Unplug the appliance (or switch off its breaker) and shut off the water supply valves before removing panels or disconnecting hoses. Keep towels handy for residual water.

  1. Reset the power. Whirlpool says to unplug the refrigerator or switch off its breaker for 1 minute, then restore power.
  2. Check that cooling is on. After the reset, Whirlpool says to make sure the cooling function is turned on, since a fridge can come back with cooling off and won't keep food cold.
  3. Watch it for a minute. Whirlpool says to monitor the refrigerator for 1 minute to make sure the code doesn't come back.
  4. While it's being sorted out, keep the doors closed and keep an eye on temperatures with a thermometer. The fridge may not run normally if the boards can't talk.
  5. If F6 E1 comes back, Whirlpool's advice is to schedule service (1-866-698-2538 in the US).

🛠 When to call a pro

  • The code returns after a 1-minute power reset.
  • The next step is checking the harness connections at both the display board and the main control board, which means unplugging the fridge and opening control covers; the main board area carries line voltage.
  • Whirlpool's tech sheet describes a service diagnostics mode (press any three different keys in sequence, three times within 8 seconds) that shows up to five stored fault codes in priority order. It's meant for technicians and the key layout varies by model.
  • If the harness is fine, Sears PartsDirect's order is to replace the user interface control first and the main control board only if the problem persists. Both are model-specific, so match the part number to the model number on the fridge's label.
  • The fridge or freezer is getting warm. Move perishable food and call for service.

Parts that commonly fix it

Always match the part number to your exact model.

⚙

Whirlpool refrigerator user interface / display board (exact part for your model)

Only after the harness has been checked; display boards are model-specific.

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⚙

Whirlpool refrigerator main control board (exact part for your model)

Last in the repair order; match the part number to your model number.

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⚙

Refrigerator and freezer thermometer

Lets you watch whether the fridge is holding safe temperatures while F6 E1 is showing.

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Sources

  1. Whirlpool Product Help: F6 E1 Error Code - Refrigerator (bottom freezer), reset power for 1 minute, ensure cooling is on, monitor 1 minute
  2. Whirlpool Product Help: F6 E1 Error Code - Refrigerator (French door), same reset steps and service number
  3. Whirlpool refrigerator tech sheet W11446054 Rev A: F6E1 Comm Failure Between ACU 1 and HMI 1, diagnostics mode entry and fault-code display
  4. Sears PartsDirect: Whirlpool refrigerator error codes (CF, communication failure between main control board and user interface; check harness, then UI, then main board)

Last reviewed 2026-10-23. Always confirm against the manual for your exact model number.