E15
Aqua Dial
Communication Fault Between Control Board and Sensors
E15 displayed and the unit indicates a sensor communication or bus error
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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 multi-pin connector on Aqua Dial PCB, Damaged wiring harness to sensors, Electrical noise or interference, Failed control PCB communication circuit
How to Fix / Troubleshooting
Safety first: Disconnect power before opening the control head. Avoid static discharge by touching a grounded metal object before handling the PCB.
- Inspect connectors: Remove the control cover and gently press all multi-pin connectors into the PCB to ensure they are fully seated.
- Check harness routing: Ensure sensor cables are not pinched under the cover or routed near high-voltage cables that could cause interference.
- Look for damage: Examine the harness for cuts, crushed sections, or signs of overheating.
- Power cycle: Reassemble, restore power, and see if the error clears after a full power cycle.
- Replace PCB or harness: If E15 persists, replace the wiring harness or Aqua Dial control PCB as indicated by further diagnostics.
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Repair Difficulty
Medium
3/5
Required Part
Control Board Wiring Harness
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