OEM Carrier 40VA Furnace Transformer 120V–24V for Model PG9MAA024060ACKA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG9MAA024060ACKA gas furnace. The transformer converts 120V line voltage to the 24V AC signal that powers every low-voltage component in your system — thermostat, gas valve, ignition control board, and zone controls. When this part fails, the furnace goes completely dark: no thermostat response, no ignition attempt, no blower activity. A failed transformer is often mistaken for a bad control board, so always verify 24V output at the R and C terminals before condemning more expensive components.

• Specs: Input 120V AC | Output 24V AC | 40VA rating | 60 Hz | Foot-mount configuration | Wire lead connections with compatible female connectors
• OEM vs Generic: This OEM-spec unit is wound to exact Carrier factory tolerances, ensuring stable 24V output under full VA load. Generic transformers are frequently under-rated, causing voltage sag that triggers nuisance lockouts and premature control board failure.
• Install Difficulty: 2/5 — Shut off power at the breaker and disconnect the furnace before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph existing wire connections before disconnecting. Confirm 24V output at R–C terminals after installation before restoring full power.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse. Note: OEM part number HT01BC116 has been superseded by direct replacement HT680054 — same specs, factory-authorized substitution.

Compatibility: Designed for the Carrier PG9MAA024060ACKA gas furnace. Also crosses to Bryant and Payne furnace models sharing the same 120V/24V/40VA transformer specification. Cross-reference part numbers: HT01BC116, HT680054, HT01BC115, HT01BB126, HT01BC120. Verify your unit's data plate voltage and VA rating before ordering. In stock and ready to ship — order by 3PM for same-day dispatch.