E16
Clearwater
Communication Bus Fault
E16 displayed and the unit reports a communication error between display and main board (on modular models).
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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 ribbon cable between Clearwater display module and main PCB, Corroded connector pins, Damaged communication cable, Failed display module
How to Fix / Troubleshooting
Safety first: Unplug the softener before opening the control housing. Avoid static discharge to electronic boards.
- Reseat cables: Carefully disconnect and reconnect the ribbon or communication cable between the Clearwater display and main board.
- Inspect connectors: Look for bent pins, corrosion, or moisture inside the housing. Dry and clean as needed.
- Check cable routing: Ensure the cable is not pinched by the cover or pulled tight.
- Test operation: Restore power and see if the display responds normally and E16 clears.
If the error persists, substitute a known-good display module or main board to isolate the failed component.
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Repair Difficulty
Medium
3/5
Required Part
Clearwater display module
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