Beretta
Intermittent Lockout / Unstable Operation
Boiler frequently locks out and requires manual reset, with varying or no error codes shown.
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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 electrical connections, Intermittent PCB fault, Marginal fan or pump performance, Sensor connections oxidised
How to Fix / Troubleshooting
Safety: Isolate power before tightening connections.
- Record pattern: Note when lockouts occur (DHW vs CH, weather conditions, duration of run).
- Inspect connections: Check all accessible plug-in connectors on the Beretta PCB, sensors, pump, fan, and gas valve for secure fit.
- Clean contacts: Use appropriate electrical contact cleaner on oxidised terminals (technician).
- Component testing: A heating engineer should test fan, pump, and sensors under load to identify marginal components.
- PCB replacement: If no single component is identified, the main PCB may be intermittently failing.
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Repair Difficulty
Hard
4/5
Required Part
Main Control PCB
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