If the inducer is running and the vacuum lines are clear of condensate and debris

Full Port Design: 1-inch NPT threaded connections with a full port orifice maximize CV flow rates and minimize turbulence

Durable Construction: Heavy-duty brass design resists corrosion and thermal fatigue

it effectively prevents heat exchanger damage by breaking the 24V control circuit if internal temperatures exceed safe operating limits

Carrier 50HJ680054 Conversion kit 326058-755 If the inducer is runningThe Carrier 50HJ680054 controller conversion kit is a critical field installed component designed to facilitate the migration from legacy controls to updated logic on compatible Carrier rooftop units (RTU). This kit is specifically utilized to ensure seamless communication between the equipment and modern Carrier Comfort Network (CCN) protocols or standalone thermostat interfaces. By replacing obsolete board architectures, this carrier conversion kit