restoring the unit to manufacturer-specified operational parameters

Flexible Wiring: Supports both isolated and grounded-to-case coil configurations to match various circuit designs

Check for continuity across the terminals when the system is cool

Precision is critical in furnace safety circuits

Cleveland Controls AFS-442 Sensing Switch restoring the unit to manufacturer-specifiedThe Cleveland Controls AFS 442 is a professional grade air pressure sensing switch designed for critical monitoring in HVAC and energy management systems. Engineered for precision, this differential pressure switch features SPDT contacts and an adjustable set point range from 0. 05" w. c. to 2. 0" w. c., making it the industry standard for proving airflow in package burners and furnaces. The AFS 442 is technically identical to the AFS 442 3, ensuring