KitchenAid Dishwasher F6E3 Error — Too Many Suds Fix

What it means

KitchenAid dishwasher F6E3 means the dishwasher's sensing system has detected suds or foam inside the tub.
KitchenAid's wording: 'If foam or suds are detected by the dishwasher sensing system, the dishwasher may not operate properly or may not fill with water.'
The cause is almost always the wrong detergent — hand soap, laundry detergent, or hand-wash dish liquid instead of automatic dishwasher detergent.

Affected Models

KitchenAid KDPM, KDTM, KDTE, KDFE built-in dishwashers
KitchenAid KDPE, KDPE804K, KDPE234G series
KitchenAid PrintShield, Architect II, and panel-ready models
KitchenAid KUDS legacy series (older models)
Same codes appear on Whirlpool, Maytag, and JennAir dishwashers (shared platform)

Common Causes

Hand-washing dish liquid used in the detergent dispenser
Laundry detergent used by mistake
Hand soap or general cleaning soap mistakenly added
Rinse aid dispenser cap left off after refilling
Far too much automatic detergent for the water hardness in the area

How to Fix It

Open the door and remove visible suds.

Use a plastic cup or measuring jug to scoop foam out of the tub by hand.
Don't run a cycle yet — the suds need to be physically removed first.
Add vegetable oil to break the foam.

KitchenAid's exact recommendation: pour 2 to 3 tablespoons of vegetable cooking oil into the bottom of the tub.
The oil breaks the surface tension of the remaining bubbles within a few minutes.
Sounds odd; works.
Run an empty cycle with no detergent.

Close the door and run a full Normal cycle empty — no dishes, no detergent.
This flushes the soap residue out through the drain.
Run a second cycle with proper detergent, no dishes.

Add the correct automatic dishwasher detergent (powder, tab, or gel marked 'automatic dishwasher detergent').
Run a full cycle with no dishes inside.
This confirms the dispenser is clear and the detergent is working normally before you trust real dishes to it.
Check the rinse aid dispenser cap.

Open the door, find the rinse aid dispenser next to the detergent cup, and make sure the cap is tightly closed.
An open rinse aid cap leaks rinse aid into the tub between cycles — and rinse aid in unusual quantities reads as suds on the F6E3 sensor.

When to Call a Professional

F6E3 is fully owner-fixable — KitchenAid publishes the complete suds-clearing procedure.
Only call service if the code returns on the next cycle with the correct detergent and dispenser cap properly closed.

Frequently Asked Questions

Why do I keep getting F6E3 even though I'm using the right detergent?

Check the rinse aid dispenser cap — this is the most common 'mystery' F6E3.
If the cap was left loose after a refill, rinse aid slowly leaks into the tub and triggers the suds sensor on the next cycle.
Open the door, find the dispenser, and screw the cap down firmly until it clicks.