If the combustion gases aren't drafting properly due to a bird's nest in the flue or a failed vent damper

Always verify your specific system's manifold pressure against the valve's rated maximum working pressure before installation

you must use the correct mounting linkages

and 800 valve actuators

When paired with the correct DIN plug and gasket

Carrier 50TG680032 Actuator 326010-701 If the combustion gases aren'tThe Carrier 50TG680032 Actuator is a precision engineered damper actuator designed for direct integration with specific Carrier packaged rooftop units and commercial air handling systems. This component provides critical modulating control for specialized air dampers, ensuring precise airflow regulation and optimal building pressure management. Operating as a critical link in the HVAC economizer or ventilation assembly, this direct coupled actuator