Error Code: E4 Difficulty: Moderate
Problem: Indicates an issue with water overflow or leak detection, potentially caused by a faulty float switch, drain pump, or water inlet valve.
How to Fix E4 Error (Step-by-Step)
- Turn off the power and water supply to the dishwasher.
- Remove the lower dish rack to access the float switch assembly in the bottom of the tub.
- Lift the float (a plastic dome or cylinder) up and down. It should move freely and you should hear a light clicking sound from the float switch (WPW10195039) beneath it. If it’s stuck, clean any debris from around it.
- If the float moves freely but the error persists, you may need to test the switch itself. Remove the lower access panels.
- Locate the float switch at the bottom of the tub, disconnect its wires, and test for continuity with a multimeter. The switch should have continuity when the float is up and no continuity when it’s down. Replace if it fails this test.
- While you have access, inspect the water inlet valve (WPW10683603) for any signs of a slow leak, as this can cause the float to rise unexpectedly. Replace the valve if it appears to be faulty.
- Reassemble the dishwasher and restore power and confirm the error stays cleared during a full test cycle.
- Turn the appliance off, wait about 2 minutes, then turn it back on.
What to Check Next on This Amana Dishwasher
Focused repair path: dishwasher fill, drain, wash motor, heating, leak, sensor, and control checks. Do not treat a returning fault as a reset-only problem; use the point in the cycle where the fault appears to choose the next check.
- Disconnect power before opening panels, then confirm the door latch, float, inlet valve, drain path, and harness connections are seated.
- Match the timing of the failure to the likely path: fill, wash circulation, drain, heat, leak detection, or control communication.
- Clear debris from filters, sump areas, spray arms, and the drain loop before treating the fault as a failed board.
- If a part is suspected, verify voltage or continuity where appropriate and match the complete Amana dishwasher model number before ordering.
Check, inspect, clean, test, measure, remove, reconnect, clear, and replace parts only when the symptom supports that path. If these checks point toward a part, verify the complete Amana model number from the appliance tag before ordering. Similar error wording can use different valves, sensors, pumps, motors, heaters, locks, switches, fans, or control boards depending on the exact model.
Recommended Replacement Part
- WPW10683603
When It’s Better to Replace Than Repair
Dishwasher repairs can add up quickly when the pump, control, heater, or leak-related parts fail.
Confirm cabinet width, water line, drain routing, electrical connection, and panel style before ordering.
For repair parts, verify exact fit with the full dishwasher model number before buying; these links are general replacement-appliance shopping options.
- [OK]Drain pump or circulation pump failure
- [OK]Leaking tub, door, or float-switch issues
- [OK]Heater or control failures on an older unit
- [OK]Repeated poor washing or drying performance
Recommended Dishwasher Replacement Options
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Still Not Working?
If the replacement part didn’t fix the issue, you may have a wiring problem or main board failure.
More options (for a better recommendation)
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Expert: Mike Sullivan
EPA Section 608 Certified Technician with 18+ years experience.
Read Editorial Standards →Browse all Amana error codes: Amana Error Codes
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