Description
The Cleveland Controls DFS-301 SPDT Airflow Pressure Switch is a safety control part used to detect and verify air movement within ducts or combustion equipment in HVAC systems. It is mounted in furnaces, air handlers, unit heaters, or ventilation systems, and it monitors differential air pressure through sensing tubes. It has a single-pole double-throw switch that signal the control circuit that operating conditions are safe. It operates as an interlock mechanism that prevent burner ignition or fan operation when airflow is restricted or absent, supporting system safety and operational reliability.
