F70
Whirlpool
No Communication Between User Interface and Main Control
Dryer displays F70 and is unresponsive or partially responsive
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Safety Warning
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.
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Possible Causes
Loose UI-to-main control harness, Damaged communication cable, Failed user interface board, Failed main control board
How to Fix / Troubleshooting
Safety First: Disconnect power before accessing the console or control board.
- Access controls: Remove the top panel and then the screws securing the control console. Carefully tilt the console forward.
- Check harness connections: Locate the communication harness between the user interface (UI) and main control. Disconnect and reconnect both ends to ensure solid contact.
- Inspect cable: Look for pinched, cut, or burnt sections of the harness. Replace if damaged.
- Board inspection: Examine both the UI board and main control board for burnt components, corrosion, or cracked solder joints.
- Isolate failure: If possible, follow Whirlpool service diagnostics to determine whether the UI or main control is not responding. Often, replacing the UI board resolves F70, but in some cases the main control is at fault.
- Replace faulty board: Install the correct Whirlpool replacement board, transferring any overlay or knobs as needed.
- Reassemble and test: Reinstall the console and top panel, restore power, and verify normal operation.
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Repair Difficulty
Hard
4/5
Required Part
User Interface Harness
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