Dryer displays F18, may freeze or not respond to commands

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

Control board microcontroller fault, Power surge damage, Internal bus error on PCB, Moisture damage to electronics

Safety first: Disconnect mains power before inspection.

Steps to check:

Power cycle: Leave the dryer unplugged for at least 15–20 minutes, then reconnect and test.
Check environment: Ensure the dryer is not installed in a very damp area causing condensation on the control board.
Inspect PCB: Remove the top cover and inspect the main PCB for corrosion, insect damage, or burnt components.

Persistent F18 almost always indicates a defective control board that must be replaced.

Hard 4/5

Main Control Board

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