A14
Beretta
Main PCB Fault / Internal Control Error
Boiler shows A14, no heating or hot water, may occur after power surge or lightning.
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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
Damaged main PCB due to surge, Corrupted firmware, Internal relay failure, Short circuit in connected components overloading PCB
How to Fix / Troubleshooting
Safety: Isolate power before accessing the PCB. Electronic repairs should be done by a qualified technician.
- Power reset: Turn off the boiler at the mains for several minutes, then restore power and attempt a reset.
- Check for external damage: Look for signs of burning or water ingress on the PCB area.
- Technician – inspect PCB: Remove the PCB cover and inspect for blown tracks, burnt components, or swollen capacitors. Replace the Beretta main PCB if damaged.
- Check connected components: Before fitting a new PCB, test pumps, valves, and fans for shorts to prevent immediate damage to the replacement board.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control PCB
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