Trane TRR0455 Transformer 326010-701 the 79J21 is the current

the 79J21 is the current OEM designation and is fully backwards compatible with legacy part numbers 79H21

this HVAC replacement motor features an integrated weather shield to protect internal components from moisture and environmental debris

maintaining system efficiency during low-ambient conditions

It is not compatible with single-phase residential power without the use of a phase converter

it is designed to manage the timing for various electrical loads within the air handler or furnace

Trane TRR0455 Transformer 326010-701 the 79J21 is the currentThe Trane TRR0455 Transformer is a critical OEM replacement part designed for technicians servicing high efficiency HVAC equipment. This industrial grade control transformer features a 200 230V primary input and steps down to a stable 24V secondary output, providing the necessary 24 volt power for HVAC control circuits, relays, and contactors. With a 35VA power rating, it is engineered to handle the load requirements of residential and light