E12 error and the unit displays low inlet pressure or fails to start regeneration due to pressure.
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.
Possible Causes
How to Fix / Troubleshooting
Safety: Turn off power to any well pump systems before working on pressure components. Close the softener bypass if removing screens.
Steps:
- Check inlet valve: Ensure the AquaClean inlet valve is fully open and the bypass is in service position.
- Inspect inlet screen: Remove the inlet fitting or screen on the valve head and rinse out any sediment or debris.
- Measure pressure: Use a pressure gauge on a nearby faucet to confirm that house water pressure meets AquaClean specifications (typically 20–100 psi).
- Well system check: If on a well, verify the pressure switch and pump are operating correctly.
If adequate pressure is confirmed and E12 persists, the internal pressure sensor or control board on the AquaClean unit may be faulty and require replacement.
Repair Difficulty
Required Part
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