Common signs include the blower motor running constantly

preventing combustion leaks

This component is cross-compatible with the Sensus 043-B series

this is a 120VAC solenoid gas valve

Sporlan 903112 Pressure Control 322056-301 Common signs include the blowerThe Sporlan 903112, also identified as the LAC 5 295HP 1 2ODF, is a non adjustable low ambient head pressure control valve designed to maintain system stability in air cooled condensers. In cold weather, this valve modulates to restrict liquid flow from the condenser while simultaneously bypassing hot gas into the receiver. This action backs up liquid in the condenser to reduce its effective surface area, ensuring the condensing pressure remains high