Whirlpool Dishwasher Error Code F6 E4 — Water Supply / Float Switch Error
What this means
The F6 E4 error means the float switch in the base of the dishwasher has been activated, indicating either an overfill or water leak into the base pan.
Step-by-step fix
3 stepsCheck for standing water
Open the dishwasher and look at the bottom of the tub. If there's standing water, try running a cancel/drain cycle.
Remove the bottom rack and filter to see the sump area clearly.
Check under the dishwasher
Remove the kick plate (front lower panel). Look for water underneath the unit. If water is in the base pan, the float switch triggered correctly — find the leak.
Place a paper towel under the unit — it makes small leaks visible.
Clean the float switch
The float is a small dome-shaped piece in the front-left or front-right of the tub floor. It can get stuck if debris accumulates around it. Clean the area and make sure the float moves freely up and down.
A stuck float mimics an overfill condition. Pressing it down manually and releasing should produce a click.
When to call a professional
If there's water in the base and you can't find the leak source, a technician should investigate.
Related error codes
Information compiled from manufacturer service manuals, official troubleshooting documentation, and appliance repair industry resources. This guide is for informational purposes only — always consult a qualified technician for complex repairs.
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No replacement parts typically needed for this fix.
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