While the contactor is the direct replacement for 037H004123

utilizing this genuine Rheem-Ruud 24V transformer ensures strict adherence to factory specifications and optimal component longevity in both heating and cooling cycles

maintaining a consistent 3/8-inch flame coverage on the sensor tip

preventing combustion byproduct bypass and maintaining the integrity of the chimney-vented system

as it provides a uniform

Johnson Controls A99BB-600 Temperature Sensor Els PW 17895 While the contactor is theThe Johnson Controls A99BB 600 is a high precision PTC silicon temperature sensor engineered for demanding HVACR applications, offering an exact 1: 1 replacement for the A99BB 600C model. This 1000 ohm temperature sensor features a negative temperature coefficient (PTC) design that ensures linear resistance output across its entire 40 to 212? F temperature range. Designed for versatility, this sensor is a staple for HVAC controllers and refrigeration