F18
KitchenAid Communication or Power Supply Fault

Washer displays F18 and may not complete cycles; often associated with communication or power issues.

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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

Unstable household voltage, loose power connector at control, failing main control power supply section, internal board short

How to Fix / Troubleshooting

Safety First: Disconnect power before opening any panels. Use a properly rated meter for live tests if needed.

Step-by-step checks:

  • Verify supply voltage: Confirm the outlet provides stable 120 VAC and that no extension cords or power strips are used.
  • Inspect power cord and filter: Remove the rear or top panel and check the line filter and power cord connections to the control. Tighten any loose spade terminals.
  • Control board check: Look for burnt or cracked components in the power supply area of the main control.

When to replace: If external power is stable and connections are secure, a persistent F18 usually requires replacement of the main control board.

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Repair Difficulty

Hard 4/5

Required Part

Main Control Board (CCU)
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