Whirlpool · Dishwasher Moderate

F6E4 — Float Switch Open

The overfill float switch is reporting an open circuit, often because the float is stuck up or its switch has failed.

Keep using it?
Yes, with caution
DIY difficulty
Easy
Typical cost
$30-60
Verified against
applianceaid.com ↗

The fix

Water inlet valve

Water inlet valve fault

$30-60 moderate difficulty 45 min Tools: screwdriver, nut driver, pliers

Diagnose first: Shut off water supply before replacing. Verify supply valve is open and screen filter at valve inlet is clear.

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How to fix it

  1. Open the door and lift the float (front-right of tub floor) — it should move freely and drop back down.
  2. Remove any debris around the float well; clean with a damp cloth.
  3. If the float moves freely but F6E4 persists, pull the toe-kick and reseat the harness at the overfill switch under the tub.
  4. Test the switch with a multimeter — it should change state when the float is lifted.
  5. Replace the overfill float switch if it does not change state.

Why it happens

Typical signs: F6E4 on display · Dishwasher won't fill · Cycle aborts immediately

  • Float stuck in raised position Debris under the float in the front-right of the tub holds it up.
  • Failed overfill switch under the tub Microswitch under the float has gone open.
  • Loose harness to the float switch Connector under the dishwasher backed off.

Other parts sometimes needed

If diagnosis points to a failed part, these are the common replacements. As an Amazon Associate we earn from qualifying purchases.

  • Whirlpool dishwasher float switch Common replacement
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More Whirlpool dishwasher codes

E1 E1 — Fill / Water Supply Problem (legacy code) E4 E4 — Overfill / Water in Drip Tray F1E1 F1E1 — Control Module Fault F1E2 F1E2 — Incompatible or Failed Control Board F2 F2 — Water leak detected F3E1 F3E1 — Thermistor/OWI Sensor Open

All Whirlpool codes → All dishwasher codes →

Always unplug an appliance before servicing it. This guide is for informational purposes and is not a substitute for a qualified technician. Verified against manufacturer documentation: applianceaid.com.