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Why is my blower fan running constantly but the furnace isn't heating
This model is specifically designed as a high-reliability field replacement for various Norton and Robertshaw silicon carbide igniters
blower wheel
The Cut-In (80 PSI) is the pressure at which the switch closes to allow the system to resume normal operation
Cleveland Controls DFS-221-112 Switch Why is my blower fanThe Cleveland Controls DFS 221 112 Switch is a fixed setpoint air pressure sensing switch designed for critical airflow proving in duct heaters, ovens, and energy management systems. This SPDT airflow switch is factory calibrated to actuate on a pressure rise at 0. 05" WC ( 0. 02" WC), making it an ideal solution for applications requiring a non adjustable, tamper proof safety interlock. Built with a durable silicone diaphragm and a zinc plated steel
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