This HVAC rocker switch provides a reliable manual disconnect point

making it an ideal choice for verifying the run status of small fractional horsepower motors

Compatible with a broad range of 1F90 series and 1F70 series units (excluding Blue models)

This deluxe-level mechanical relay features a full suite of diagnostic tools

While it is an NTC 10K ohm sensor

Cleveland Controls DFS-301-112 Switch This HVAC rocker switch providesThe Cleveland Controls DFS 301 112 is a precision engineered fixed set point airflow switch designed for critical monitoring in duct heaters, ovens, and high performance HVAC systems. As an airflow proving switch, it utilizes a sensitive silicone diaphragm and a snap acting SPDT switch to ensure air pressure rises meet specific operational thresholds before permitting equipment engagement. This model is factory calibrated to operate at a fixed 0. 03"