Lochinvar & A.O. Smith 100277940 Board Freon providing superior reliability in high-temperature

providing superior reliability in high-temperature and high-pressure HVACR environments

For smooth and more efficient operation of your unit

the Trane COM11139 is the manufacturer-designated direct replacement for the COM7478

This is an "Open High" SPST switch

The cast iron valve body and 1" threaded vent with stainless steel screen ensure durability for veteran HVAC contractors requiring reliable natural gas service equipment

Lochinvar & A.O. Smith 100277940 Board Freon providing superior reliability in high-temperatureThe Lochinvar & A. O. Smith 100277940 Board is a critical low voltage connection board engineered for precision signaling in high efficiency heating systems. Specifically designed for the Knight KH055 285 fire tube boilers, this OEM replacement part serves as the central communication interface between the main controller and auxiliary system components. As a veteran technician knows, maintaining signal integrity in commercial water heating