or the LED status light remaining dark while 24V power is supplied to the board

and HKN315-3685

This 5SAY-02 electronic transformer operates on a 120V primary input

Smith 100110279 Gas Thermostat is a critical field replacement component designed for precise temperature regulation in high-efficiency LP gas water heaters

it features a pre-purge and post-purge cycle to ensure safe combustion chamber venting and reliable ignition under varied manifold pressures

Browning B 2 1/8 Bushing 326058-756 or the LED status lightAs a veteran tech, you know that keeping high torque HVACR drives in alignment starts with a reliable connection. The Browning B 2 1 8 Bushing is the industry standard for securing sheaves, sprockets, and pulleys to a 2. 125 inch shaft. Built with a solid flange and a double split barrel, this split taper bushing ensures maximum concentricity, reducing the vibration that kills bearings. Unlike standard QD bushings, the Browning B series features a 3