OEM Carrier Furnace Transformer 120V/24V 40VA for Model PG9YAA048080ACSS

This OEM Carrier control transformer (part number HT01BC117, also cross-referenced as HT01BC117A and Basler Electric BE161840GDD) is the factory-specified replacement for the Carrier PG9YAA048080ACSS packaged gas furnace. The transformer steps down 120V line voltage to the 24V AC signal used by the furnace's control board, thermostat circuit, and gas valve. When this part fails, the entire low-voltage control circuit goes dead — the furnace will not respond to thermostat calls, the ignition sequence will not initiate, and no fault codes will display. A failed transformer is often misdiagnosed as a control board failure, making it the smart first-check before replacing more expensive components.

• Specs: 120V primary | 24V secondary | 40VA rated | Foot-mount configuration | 60Hz | Cross-references: HT01BC117A, BE161840GDD, HT680056 (current supersession)
• OEM vs Generic: This OEM unit is wound to exact Carrier factory tolerances, ensuring stable 24V output under full load. Generic transformers can sag under peak demand, triggering nuisance lockouts and premature control board failure.
• Install difficulty: 2/5 — Shut off power at the breaker and verify zero voltage before disconnecting wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all wires before removal. The transformer mounts with two screws and reconnects via quick-disconnect terminals on most applications.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Confirmed fit for Carrier PG9YAA048080ACSS packaged gas furnace, as well as other PG9YAA and PG9YAB series models. Always verify your unit's data plate shows a 120V/24V 40VA transformer before ordering. Our team is available to confirm fitment — reach out before you buy and we'll verify your part number. Order now for same-day shipping.