Whirlpool · Dishwasher
Whirlpool Dishwasher F6E4 Error Code
Float switch open or dishwasher not level
What this error means
F6E4 is the modern F/E code for an open overfill float switch—the same condition as F24 on numeric displays. The control detected the flood sensor tripped before or during a fill step.
How F6E4 is detected
When F6E4 appears on a Whirlpool dishwasher, the control board has confirmed that water did not leave the machine within the programmed drain window. On Whirlpool WDT750SAKZ, Whirlpool WDT730PAHZ, and similar variants, the drain pump runs for a fixed interval—often three to seven minutes on washers and dishwashers—while a pressure switch or turbidity sensor verifies the tub or sump is empty. If water remains, the cycle stops to prevent spin with a full tub or overflow on the next fill.
Most F6E4 calls are resolved without parts: press the float disc down gently at the tub front-right corner until it clicks. Restricted drain paths mimic pump failure because the impeller spins against a blocked hose or filter. Document whether the pump hums audibly during the drain step; a humming pump with no water movement points to a clogged filter or kinked hose, while silence may indicate a failed pump motor or loose wiring at the harness.
After clearing blockages, run a short cycle and listen at the drain hose for steady water flow. If F6E4 returns on the next load with a clean filter and straight hose, measure resistance at the pump motor connector per the service manual for your model before ordering a replacement pump assembly.
Common causes
- Overfill float disc stuck in the up position from a tilted install
- Suds or water splash holding the float raised
- Actual overfill from a stuck-open inlet valve
- Water in the leak pan from a loose hose clamp
Step-by-step fixes
- 1Press the float disc down gently at the tub front-right corner until it clicks
- 2Use a level on the door frame and adjust front legs until the tub is square
- 3Cancel the cycle and bail water if the tub overfilled—then shut off the supply faucet
- 4Remove the kick plate and towel-dry the base pan before restarting
When to call a technician
Persistent F6E4 with a dry tub and level install points to a failed float switch or inlet valve needing replacement.
Affected models
- Whirlpool WDT750SAKZ
- Whirlpool WDT730PAHZ
- Whirlpool WDF540PADM
Prevention & maintenance
- Clean drain filters and hose terminations monthly on high-use dishwashers to prevent F6E4 from lint and food debris buildup.
- Record when F6E4 appears in the cycle and whether it clears after a 60-second power reset on your Whirlpool dishwasher—that detail speeds diagnosis if you call service.
- Keep the model and serial number from the rating plate when ordering parts for F6E4; Whirlpool uses multiple revisions with different harness lengths and board firmware.
- Photograph wiring connector orientation before disconnecting any component while troubleshooting F6E4; reversed plugs on pumps and valves cause immediate repeat faults.