E13
Aqmos Display / Power Regulation Fault

E13 error and display is blank or flickers intermittently

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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

Loose display ribbon cable, Failed display module, Faulty low-voltage power supply on PCB, Moisture ingress in control head

How to Fix / Troubleshooting

Safety: Unplug the softener before removing the control cover.

  • Check for moisture: Inspect the control housing for condensation or water leaks from plumbing above. Fix any leaks and dry the area thoroughly.
  • Inspect display connections: Locate the ribbon cable or connector between the display and main PCB. Reseat the connector firmly.
  • Examine PCB components: Look for burnt or cracked components in the low-voltage power section (near the power input). Any visible damage suggests PCB replacement.
  • Test power adapter (if external): Measure output voltage of the external power supply and compare with the rating. Replace if out of tolerance.
  • Replace display module: If the backlight or segments are missing despite correct voltages, replace the display module or entire control head as supplied by Aqmos.
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Repair Difficulty

Hard 4/5

Required Part

Display Module / Control PCB
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