Err 9
Culligan
Keypad or User Interface Failure
Display shows “Err 9” and unit may not respond to keypad inputs
Advertisements
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.
Advertisements
Possible Causes
Damaged keypad membrane, Moisture intrusion into display, Loose ribbon cable, Failed display board
How to Fix / Troubleshooting
Safety: Unplug the softener before removing the front control panel.
- Inspect keypad area: Look for signs of water intrusion, condensation, or physical damage to the buttons.
- Check ribbon cable: Remove the control cover and verify the keypad/display ribbon cable is fully seated on the main board. Reseat it carefully.
- Dry moisture: If condensation is present, allow the control to dry completely in a warm, dry area before reassembly. Do not use direct heat guns.
- Test operation: Reconnect power and test each button. If Err 9 persists and buttons do not respond, the keypad or display board likely needs replacement.
Advertisements
Repair Difficulty
Medium
3/5
Required Part
Culligan keypad / display assembly
Check Price on Amazon
We may earn a commission from links on this page.
Advertisements