E11
BWT
Communication Bus Fault
Display shows E11 and the unit reports a communication error between display and valve head
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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 communication cable between display module and main valve, Damaged data cable, Moisture ingress in control housing, Faulty display PCB
How to Fix / Troubleshooting
Safety first: Disconnect power before opening any electronic enclosures.
- Inspect cables: Remove the front cover and locate the communication cable between the display and main control board. Reseat both ends.
- Check for moisture: Look for condensation or water traces inside the housing. Dry thoroughly and identify any leak paths (e.g., missing gaskets).
- Examine cable: Check for cuts, crushed sections, or bent pins on connectors. Replace the cable if damaged.
- Power-cycle: After reassembly, restore power and see if E11 clears.
If the error remains, either the display module or main control board may be defective and should be tested or replaced by a technician.
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Repair Difficulty
Medium
3/5
Required Part
BWT communication cable
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