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This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier GA1AAD060130ACJA gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage safety circuits. When the transformer fails, the entire control circuit loses power — the thermostat goes blank, the system won't respond to any calls for heat or cooling, and in many cases the furnace appears completely dead with no error codes. A blown fuse on the secondary side is often the first clue the transformer has failed or is overloaded.
Compatibility: Engineered specifically for the Carrier GA1AAD060130ACJA gas furnace. Confirm your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering. If you're unsure, our parts team is happy to verify fitment before you buy — no guesswork, guaranteed right part.