Whirlpool Dryer Error F70: Communication Failure

The Logic Verdict

My Take: The F70 code specifically means the Main Control Board and the Console Electronics (User Interface) are not talking to each other. While the tech sheet suggests checking harnesses first, in many cases (like the one in the video), the issue is a failed Console Control Board. If percussive maintenance (whacking the console) temporarily fixes it, you almost certainly have a bad board or a loose connection.

What It Means

F70 = Communication Error. The heartbeat signal between the main computer (usually in the back or side) and the button panel (front) has been lost.

Potential Causes

1. Console Control Board Failure: The board behind the buttons has failed.
2. Loose Connections: The wire harness connecting the two boards has vibrated loose.
3. Main Control Board Failure: Less common for this specific code, but possible.

Step-by-Step Troubleshooting

1. Check Connections: Unplug the dryer, remove the top panel, and locate the wire harness running from the front console to the main board. Unplug and replug all connections to scrape off oxidation.
2. Continuity Test: If you have a multimeter, check the continuity of the wires in the harness to ensure none are broken.
3. Replace Console Board: If wiring is good, the Console Control Board (User Interface) is the most likely culprit.
4. Replace Main Board: If the console board doesn’t fix it, the main board is the next step.

Resources

• Whirlpool Dryer User Interface Boards (Amazon)
• Whirlpool Dryer Main Control Boards (Amazon)