The 90-T40F3 provides a secondary current of 1

the 600552F is the official manufacturer-designated replacement for the legacy 388146AG part number

Technicians should check for continuity across the terminals at room temperature

ensuring the system maintains stable superheat even under varying load conditions

preventing unburned fuel vapors from compromising the sealing rings

White-Rodgers 3049-115 Flame Sensor Els PW 29614 The 90-T40F3 provides a secondaryThe White Rodgers 3049 115 is a professional grade mercury flame sensor engineered for precise pilot flame verification in commercial and residential heating systems. Featuring a 48 inch capillary element and a Bulb Style #20, this Type D plug in sensor is the industry standard HH71PD024 direct replacement. Designed for high heat environments, the mercury filled sensing bulb vaporizes under pilot heat, actuating a snap action switch to prove flame