This unit requires a 24 VAC (

reducing communication-related error codes

critical for preventing ice formation at the expansion valve

you must manually cycle the thermostat or remove 120V power for 5 seconds to clear the lockout

Common Questions Is the 50G10 bracket compatible with non-Lennox units

Lochinvar & A.O. Smith 100209982 Blower Assembly 321042-401 This unit requires a 24The Lochinvar & A. O. Smith 100209982 Blower Assembly is a critical OEM replacement part engineered for high performance combustion and exhaust management in residential and light commercial gas water heater systems. As a genuine PDV blower assembly kit, this unit is built to the exact specifications required by Lochinvar and A. O. Smith, ensuring a drop in fit for PR 4040 series and other compatible power direct vent models. For technicians, this