Kenmore Dryer Error Code F70 — No Communication Between Boards
What this means
Error F70 (and related F71) indicates a communication failure between the electronic control board (ECB) and the user interface control board (UICB). These boards exchange data via a ribbon cable or wire harness. A loose connection, damaged cable, or failed board can trigger this error.
Alternate codes: F71
Step-by-step fix
4 stepsPower cycle
Unplug for 10 minutes and restart.
Check the ribbon cable
Inspect the ribbon cable or wire harness connecting the two boards. Reseat the connectors on both ends.
The cable can work loose from vibration over time.
Look for damage
Check for bent pins, corrosion, or physical damage to the connectors.
Replace faulty components
If connections are secure, one of the boards may have failed and needs replacement.
Try replacing the less expensive user interface board first.
When to call a professional
If you cannot determine which board has failed, professional diagnosis is recommended.
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
Learn more about our sourcesParts you may need
User Interface Board
Part #W10111616 · $80–$150
If UI board communication circuit has failed
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