E4Serious
Haier Dishwasher E4 Error Code
Excessive water detected in the tub, triggering the float switch.
Common causes
- Water inlet valve stuck open or leaking
- Faulty float switch (stuck down)
- Control board failure causing continuous fill
How to fix it
- Turn off the water supply immediately to stop flooding.
- Check the float switch moves up and down freely.
- Inspect the water inlet valve for signs of leakage.
⚠ When to call a pro: If the float switch works but water continues to fill, the inlet valve or control board must be replaced by a pro.
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Always unplug the appliance (and turn off the water for washers/dishwashers) before inspecting. These guides are for information only and are not a substitute for a professional repair.