Washer-dryer combo shows F70 and becomes unresponsive; display may freeze.

This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.

If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.

Possible Causes

Failed main control board, power supply instability, loose UI-to-CCU harness, internal CCU fault

Safety first: Unplug the appliance before working on the control system.

Step-by-step checks:

1. Power reset: Unplug for 10 minutes, then plug back in and try to enter a diagnostic mode (refer to tech sheet). If F70 returns immediately, suspect CCU.
2. Inspect CCU: Remove the top panel and examine the CCU for burnt components or corrosion.
3. Reseat harnesses: Unplug and reconnect all connectors to the CCU and UI boards.
4. Replace CCU: If the error persists and wiring is intact, replace the main control board with the correct Maytag part.

Professional Required 5/5

Main Control Board (CCU)

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