CE
Worcester
Control PCB / Interface Communication Fault
Boiler shows CE, communication error between user interface and main PCB, display may be blank or flicker.
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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 display and main board, moisture ingress on PCB, failed Worcester control board, power supply instability
How to Fix / Troubleshooting
Safety first: Turn off power before removing the front panel or accessing electronics.
Homeowner checks:
- Switch off the boiler at the fused spur for 60 seconds, then turn back on.
- Check that no other appliances are causing power dips or tripping the circuit.
Engineer checks:
- Inspect and reseat the communication ribbon cable between the display module and main PCB.
- Check for signs of water damage or corrosion on the PCB and connectors.
- Measure supply voltage to the boiler and ensure correct polarity and earthing.
- Replace the Worcester main PCB or display module if confirmed faulty.
Because this involves live electrical circuits and safety controls, a qualified engineer should perform the repair.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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