E4
Thor Kitchen
Overflow / Leak Protection Activated
Dishwasher displays E4 and may stop filling or draining; sometimes accompanied by water in the base pan or a continuous drain pump sound.
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Safety Warning
This repair may involve working with high voltage components or water connections. Always unplug the appliance before removing any panels.
If you are not confident in your ability to perform this repair safely, we strongly recommend contacting a professional technician.
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Possible Causes
Leak in tub or hose, Loose clamp on circulation or drain hose, Over-foaming from incorrect detergent, Faulty or stuck float switch in base
How to Fix / Troubleshooting
Safety first: Disconnect power and turn off the water supply immediately to prevent further leakage.
Step-by-step checks:
- Check for visible leaks: Look around the base of the dishwasher and under the sink for water. Mop up any standing water.
- Remove toe-kick panel: With power off, remove the lower front panel and inspect the base pan. If water is present, carefully sponge it out and dry the area thoroughly.
- Inspect float switch: Locate the float or leak sensor in the base pan. Ensure it moves freely and is not stuck in the raised (leak) position. Clean any debris or soap residue.
- Check hoses and clamps: Examine the circulation hose, drain hose, and inlet connections for drips, cracks, or loose clamps. Tighten clamps and replace damaged hoses.
- Detergent use: If you see excessive suds, confirm you are using only dishwasher detergent (not dish soap) and correct dosage.
- Test run: After drying and correcting issues, restore power and run a short cycle while observing for leaks.
Warning: Persistent leaks can damage flooring and cabinetry; if you cannot locate the source, contact a professional.
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Repair Difficulty
Hard
4/5
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