Whether servicing rooftop units

Common indicators include the furnace clicking repeatedly without a flame

Installing a higher temperature limit can lead to unsafe system operation and potential heat exchanger failure

allowing for quick visual verification of system status from a distance

Cleveland Controls RFS-4001-038 Pressure Switch Whether servicing rooftop unitsThe Cleveland Controls RFS 4001 038 is a professional grade airflow pressure sensing switch designed for robust performance in HVAC and energy management systems. Engineered to detect positive, negative, or differential air pressure, this adjustable pressure switch features a set point range from 0. 15" w. c. to 5. 0" w. c. with a specialized progressive differential for precise calibration. This model is a direct replacement for RFS 4001 025 and