The F6 E4 error means fill fault — dishwasher didn't detect water filling within the expected time.
The Whirlpool dishwasher displays the F6 E4 error and halts the current cycle until the underlying problem is fixed.
Check these in order. The first cause accounts for the majority of F6 E4 errors.
The shutoff valve feeding the dishwasher supply line is the first thing to check. Even partially closed, it can drop flow below what the machine needs.
The supply hose running from the under-sink valve to the dishwasher inlet can get kinked during installation or when items are pushed under the sink.
A mesh screen at the dishwasher inlet port catches sediment. A blocked screen reduces fill rate below the threshold.
If supply, hose, and screen are all clear, the inlet valve solenoid has failed. Test with a multimeter — no continuity when energized means replace.
Follow these in order. Stop as soon as the error clears.
Open the cabinet, locate the supply valve, and turn it fully counterclockwise. This is the most common fix.
Cut power via the circuit breaker or outlet before touching the inlet valve.
Trace the hose from valve to dishwasher inlet. Straighten any kinks.
Disconnect the supply hose at the dishwasher inlet. Remove the mesh screen and rinse it under running water. Reinstall and reconnect.
Run a quick wash cycle and listen for water entering the unit within the first minute.
Test the solenoid with a multimeter. If no continuity when powered, replace the valve (~$25–55).
For warranty service, contact Whirlpool support ↗ or a certified appliance technician.