this heat pump solenoid coil provides the consistent magnetic field required for mechanical valve transitioning

Common issues include blocked flue pipes

Designed for professional installation

it resets automatically

Common signs include the unit failing to enter defrost mode

Cleveland Controls DFS-221 Switch this heat pump solenoid coilThe Cleveland Controls DFS 221 Air Flow Switch is a high precision, factory set differential pressure switch designed for air proving in demanding HVAC and energy management systems. Engineered to detect positive, negative, or differential pressure, this SPDT air pressure sensing switch is factory calibrated to operate on a pressure rise at 0. 05" 0. 02" w. c.. Its non adjustable design ensures consistent performance in duct heaters, ovens, and