15
Biasi
PCB Communication / Internal Fault
Boiler shows error 15, may indicate communication error between display and main PCB or internal electronics fault.
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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
Faulty display board, Loose ribbon cable between boards, Main PCB failure, Moisture ingress on electronics
How to Fix / Troubleshooting
Safety: Isolate electrical power before opening the control panel.
- Power reset: Turn off the boiler at the isolator for 5 minutes, then restore power to see if the error clears.
- Inspect connections: Open the control panel and check the ribbon cable and connectors between the user interface and main PCB. Reseat them carefully.
- Check for moisture: Look for signs of water ingress from above (e.g., from a leaking flue or pipe). Any moisture on the PCB must be dried and the source of the leak repaired.
- Engineer replacement: If the error persists, a technician may need to replace the display board or main PCB and reconfigure parameters according to Biasi specifications.
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Repair Difficulty
Professional Required
5/5
Required Part
Control PCB Assembly
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