E01
Beretta
General Ignition Lockout / Safety Shutdown
Furnace shows E01, immediate lockout, no ignition sequence starts
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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
Serious ignition or flame detection fault, Control board internal error, Incorrect wiring after service, Short circuit on gas valve or ignition circuit
How to Fix / Troubleshooting
Safety: Turn off power and gas. E01 often indicates a serious fault.
- Visual inspection: Open the control compartment and inspect the Beretta control board for burn marks, melted components, or burnt smell. If present, do not power the unit again.
- Check wiring harness: Ensure all multi-pin connectors are fully seated and that no wires are pinched between panels.
- Reset once: Restore power and attempt a single reset as per the manual. If E01 reappears immediately, shut down and call a qualified technician.
Do not repeatedly reset an E01 fault without identifying the cause.
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Repair Difficulty
Professional Required
5/5
Required Part
Main Control Board
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