A12
Beretta
Permanent Lockout / Safety Lock
A12 error; appliance refuses to start after multiple resets
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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
Repeated ignition or flame failures, Overheat events not resolved, Internal control board safety lock, Serious combustion or flue fault
How to Fix / Troubleshooting
Safety: Do not repeatedly reset a Beretta water heater that is in permanent lockout. This indicates an unresolved safety issue.
- 1. Note previous errors: Check the history (if available) or recall which codes appeared before A12. This helps identify the underlying fault (e.g., A01, A03, A04).
- 2. Power cycle: Turn off power for several minutes, then restore. If A12 persists, the unit requires professional service.
- 3. Do not bypass safeties: Never bridge thermostats, sensors, or switches to clear A12. This is dangerous and voids warranty.
- 4. Call authorized service: A Beretta technician can access service mode, read detailed fault logs, and test combustion, flue, and safety circuits, replacing defective components as needed.
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Repair Difficulty
Professional Required
5/5
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