As a critical HVACR replacement part

or a relay that "chatters" or stays "stuck closed

and ITCB series

this component provides the isolation and thermal stability necessary for long-term operational readiness

such as a dirty filter

Cleveland Controls AFS-398 Air Switch Els PW 17895 As a critical HVACR replacementThe Cleveland Controls AFS 398 is a professional grade air pressure sensing switch engineered for precision proving in HVAC and energy management systems. This differential air pressure switch features a versatile adjustable set point range from 0. 03" to 2. 0" w. c., allowing for exact field calibration using the integrated adjustment screw. This SPDT air switch is housed in a rugged plated enclosure with a high quality silicone diaphragm, making it