OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG9MAA060120AFKA

This OEM Carrier control transformer is the factory-specified replacement for the Carrier PG9MAA060120AFKA gas furnace. It steps down 120V line voltage to the 24V AC signal that powers every low-voltage control circuit in your system — including the thermostat, control board, gas valve, and inducer relay. When this transformer fails, the entire low-voltage side of your furnace goes dark: the thermostat goes blank, nothing responds to a heat call, and the system won't attempt ignition at all.

• Specs: Input 120V AC | Output 24V AC | 40VA rated | 60Hz | Foot-mount configuration | Wire-lead connection | Integrated 3A fuse protection | Replaces OEM part number HT01BC116 (superseded by HT680054)
• OEM vs Generic: OEM transformers are wound to exact factory VA tolerances, ensuring stable 24V output under full control-circuit load. Undersized or off-tolerance generic units can cause erratic board behavior, nuisance lockouts, or premature control board failure — one reviewer noted a generic unit would not mount correctly without modification.
• Install Difficulty: 2/5 — Always shut off power at the disconnect and breaker before servicing. Photograph all wiring connections before removing the old transformer. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after install). Check R-to-C terminals on the control board to confirm proper voltage.
• Warranty: 1-year OEM factory warranty. Stocked in our warehouse and ships the same business day your order is placed.

Compatibility: Designed for the Carrier PG9MAA060120AFKA gas furnace. Note that OEM part number HT01BC116 has been superseded — this listing ships the current authorized replacement. Verify your existing transformer's input/output voltage and VA rating against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — don't hesitate to reach out.