When performing a HVAC sensor replacement

This 24V blower relay functions as an electromechanical switch that facilitates high-voltage power to the blower motor while being triggered by a low-voltage thermal signal

this 3-speed blower motor allows for granular control over CFM output

The contacts are rated for 10 Amps general use at 277VAC and can handle up to 1/2 HP at 125VAC or 1 HP at 250VAC

exactly like a standard PSC motor

Resideo AT40A1121 Transformer 318820-201 When performing a HVAC sensorThe Resideo AT40A1121 is a standard 40VA HVAC transformer designed for reliable 120V to 24V power conversion in residential and light commercial climate control systems. This NEMA Type D transformer features a 120V primary winding and a 26. 5V secondary output at no load, ensuring consistent voltage delivery to thermostats, gas valves, and relay coils. Built with a robust channel frame mounting configuration, this unit integrates seamlessly into