The most common culprits for performance issues are a clogged 4A bleedport or a blocked 5A restriction elbow

this genuine York HVAC part ensures precise alignment with factory burner manifolds and inducer assemblies

this replacement diaphragm is designed to withstand continuous cycling in VAV terminal units and diverse HVAC zoning systems

number of speeds

Operating on a 24V AC control voltage

Johnson Controls A-4000-142 Valve Station R-22 The most common culprits forThe Johnson Controls A 4000 142 is a professional grade dual pressure reducing valve station designed for critical pneumatic control systems requiring high capacity 20 SCFM airflow. This integrated unit combines a four way bypass valve with a multi stage filtration system to ensure "instrument quality" air. The process begins with a coalescing filter to remove oil aerosols and liquid water, followed by an activated charcoal filter that eliminates oil