Key Benefits: Precision Calibration: Factory-set to open at 7°F and close at 22°F

What happens to the program if the 24V power is lost

This board is specifically designed for Rheem and Ruud units equipped with X-13 ECM blower motors

Replacing it with this genuine York part restores correct safety operation

preventing catastrophic equipment damage or fire hazards

Aprilaire 50 Relay 321894-706 Key Benefits: Precision Calibration: Factory-setOptimize your home climate control system with the Aprilaire 50 Relay, a high performance current sensing relay designed specifically for 24V HVAC applications. This essential component ensures your whole house humidifier operates only when the furnace blower is active, preventing wasted water and protecting sensitive electronics from electrical feedback. By detecting the furnace blower motor current, the Aprilaire 50 automates the humidification