Whirlpool Washer F28 Error Code Fix: Communication Reset Guide (Steve’s DIY)

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Note: This guide is based on verified repair protocols. As an Amazon Associate, I earn from qualifying purchases.

Your washer stops mid-cycle and flashes F28. This is a classic “Communication Error”. It means the main brain (CCU) and the motor’s computer (MCU) have stopped talking to each other.

⚠️ Steve’s Field Notes: F28 is the “Communication Killer.” While most technicians will tell you to buy a $200 board immediately, 30% of the time it’s just a loose wire caused by heavy vibrations during the spin cycle. Follow Step 1 before spending any money!

The Fix: You need to inspect the communication harness between the CCU and MCU. If the wires are solid, the MCU board has likely failed.

🎥 The Repair Video: F28 Troubleshooting Masterclass

In this guide, you’ll see how to access both the CCU and MCU. This is the most reliable way to visualize the “Wiggle Test” Steve mentioned above.

👨‍🔧 Steve’s Key Repair Timestamps:

  • 00:14 – Explanation of the communication error between boards.
  • 01:47 – Steve’s Tip: Take a photo of the connectors before unplugging so you don’t mix them up!
  • 04:39 – How to remove the lower panel to find the Motor Control Board (MCU).
  • 07:02 – The trick to releasing the MCU board from its plastic bracket.
  • 11:21 – The “Wiggle” success: How simple re-seating of cables can save the day.

🛒 Parts & Tools Checklist

If the “Unplug & Pray” reset doesn’t work, you’ll likely need these:

🔌 Step 1: The “Wiggle Test” (Free Fix)

Unplug the washer. Safety first!

  1. Open the Top: Remove the three 1/4″ screws on the back and slide the top panel off.
  2. Inspect the CCU: Locate the main board. Find the thick harness labeled “Motor” or “Communication.”
  3. The Fix: Unplug the connector, spray it with contact cleaner, and plug it back in firmly. Do the same for the MCU at the bottom of the machine.

🛠️ Step 2: Replacing the Board

If cleaning the wires didn’t work, the “brain” inside the MCU has failed.

  1. Remove Lower Panel: Access the MCU box at the bottom front or back.
  2. Swap Boards: Unclip the old MCU, transfer the wires one-by-one to the new board, and snap it back into the housing.
💡 Steve’s Diagnosis Tip: If you’ve replaced the MCU and still see F28, check your wall outlet. F28 can sometimes be caused by a lack of proper grounding. Static buildup confuses the communication lines!

🔄 Step 3: Power Up & Test

  1. Plug the washer in.
  2. Select “Drain & Spin” and press Start. If it runs for 2 minutes without F28, you’ve nailed it.

🚀 Ready to Fix F28?

Whirlpool Washer Motor Control Unit (OEM)


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