E20
AquaClean
Output Driver Overcurrent Protection
E20 error and the unit indicates an overcurrent or short circuit in a valve or motor output.
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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
Shorted valve coil, Shorted motor winding, Pinched wiring harness, Failed output transistor on control board
How to Fix / Troubleshooting
Safety: Unplug the unit before inspecting wiring or coils.
Steps:
- Identify affected output: Consult the AquaClean manual to determine which component is tied to E20 (e.g., motor, brine valve).
- Inspect wiring: Trace the harness from the control board to the component. Look for crushed, cut, or melted insulation causing a short to ground.
- Test coil resistance: Measure resistance of the suspect valve coil or motor. A very low reading (near 0 ohms) indicates a shorted coil.
- Isolate and retest: Disconnect the suspect component and power the unit. If E20 clears, the component is likely defective.
Replace the shorted AquaClean valve coil or motor. If E20 persists with all loads disconnected, the main control board output stage is likely damaged and must be replaced.
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Repair Difficulty
Hard
4/5
Required Part
AquaClean Valve Coil
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