Error code reference
KitchenAid Dishwasher Error Code F8E4
Overfill switch open
Overfill switch open — overfill switch unplugged, water in leak pan under unit, overfill switch stuck in open/up position, drain issue, fill valve mechanically stuck open, unit not level, or too many suds.
First step from the service manual
Remove access panel and inspect overfill switch assembly. Ensure connector is fully seated. Check for water in leak pan.
The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.
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- Step-by-step tests with expected resistance, voltage, and continuity values
- Wiring diagram references and connector pinouts from the OEM service manual
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