E18
Zline
Drain System / Siphon or Sensor Error
Dishwasher shows E18; drain pump may run continuously even when tub is empty.
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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
Improper drain hose installation causing siphoning, Faulty water level sensor stuck in full position, Control board misinterpreting level, Blocked air gap causing backflow
How to Fix / Troubleshooting
Safety first: Turn off power before adjusting plumbing connections.
- Check drain hose routing: Ensure the drain hose has a high loop at least as high as the bottom of the countertop and is not inserted too far into the standpipe or disposal.
- Inspect air gap: If equipped, remove the air gap cap and clean out any debris or buildup.
- Verify water level sensor: Clean the sump and pressure chamber as described for level sensor errors. Replace the sensor if it remains stuck.
- Reset control: After correcting plumbing and sensor issues, restore power and run a short cycle to confirm normal drain behavior.
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Repair Difficulty
Medium
3/5
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