OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG9MAA060120AAKA

This OEM step-down control transformer (part number HT01BC116) is the factory-specified replacement for the Carrier PG9MAA060120AAKA gas furnace. The transformer converts 120V line voltage down to the 24V DC signal used by the thermostat, gas valve, control board, and every other low-voltage component in the system. When this part fails, the entire low-voltage control circuit goes dead — meaning your furnace will not respond to the thermostat, will not attempt ignition, and may display a lockout code or show no status LED activity whatsoever.

• Specs: Primary voltage: 120V | Secondary voltage: 24V | VA rating: 40VA | Class 2 control transformer | Wire lead connections | Factory-matched mounting footprint for Carrier PG9MAA060120AAKA
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances for Carrier furnaces. Generic units often have loose tolerances that can under-power the control board or gas valve, causing nuisance lockouts and premature board failures. Always replace with OEM when the control circuit is involved.
• Install difficulty: 2/5 — Shut off power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, needle-nose pliers. Photograph and label all wire connections before disconnecting the old transformer.
• Warranty: 1-year OEM manufacturer warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG9MAA060120AAKA gas furnace. Also cross-references with Bryant and Payne units sharing the same 120V–24V 40VA transformer specification. Confirm your existing transformer's primary voltage, secondary voltage, and VA rating on the data plate before ordering. Our fitment team is available to verify compatibility prior to purchase — no guesswork required.