Cleveland Controls DFS-221-156 Switch This limit switch

This limit switch

This sealed model is rated for up to 1/2 ton capacity

Common symptoms include the furnace attempting to ignite (sparking) but shutting down after a few seconds

making it ideal for high-demand compressors

013" diameter are identical

Cleveland Controls DFS-221-156 Switch This limit switchThe Cleveland Controls DFS 221 156 is a heavy duty, fixed point air pressure sensing switch engineered for precision airflow verification in HVAC, duct heater, and combustion systems. As a direct FS BO 179 cross reference, this SPDT switch is factory calibrated to actuate on a pressure rise of 0. 05" w. c. (+ 0. 02"), making it a critical safety component for proving draft in boilers and furnaces. Its open mounted design is specifically optimized for