Kenmore Dishwasher F18 Error Code — Detergent Dispenser Fault

Kenmore Dishwasher F18 Error — Detergent Dispenser Issue

The F18 error code indicates the detergent dispenser door failed to open during the main wash cycle. This means your dishes are likely washed without detergent, leaving them dirty even after a complete cycle.

Why the Dispenser Sticks

• Hardened detergent buildup jamming the dispenser door
• Rinse aid overfill causing the dispenser mechanism to stick
• Broken dispenser spring or wax motor (the actuator that opens the door)
• A dish or utensil positioned directly in front of the dispenser door

Cleaning and Testing

1. Open the dispenser compartment and clean away any detergent residue with warm water and a toothbrush.
2. Test the dispenser door manually — it should snap open freely.
3. Load the dishwasher without any items blocking the dispenser area and run a test cycle.

Wax Motor Replacement

If the dispenser mechanism is clean but still does not open, the wax motor actuator has likely failed. This small component melts with heat to release the dispenser door spring. Our technicians replace this part quickly and can test the repair before leaving your home.