Boiler locks out intermittently during windy conditions without a clear error code

Safety: Flue gas spillage is hazardous. If you suspect exhaust is entering the building, shut down the boiler and ventilate.

• Inspect vent termination: Ensure the Crown vent kit is installed per the manual, with correct orientation and clearances from corners, soffits, and other structures.
• Check joints: Verify all vent joints are properly cemented or gasketed and mechanically secured.
• Room air: Make sure the boiler room has adequate combustion air openings and is not under strong negative pressure from exhaust fans.
• Consult installer: In very windy locations, a different termination or vent routing may be required.