OEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG9MAA060120ACKA

This OEM control transformer is the factory-specified replacement for the Carrier PG9MAA060120ACKA gas furnace. The transformer steps down line voltage from 120V (primary) to 24V (secondary) at 40VA, powering the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When this transformer fails, the furnace goes completely unresponsive: the thermostat goes dark, no ignition sequence initiates, and no error codes appear because there is no power to the control board at all.

• Specs: Primary Voltage: 120 VAC | Secondary Voltage: 24 VAC | Rating: 40VA | Frequency: 50/60 Hz | Phase: Single | Factory-matched to OEM tolerance
• OEM vs Generic: OEM transformers are wound to exact factory VA and voltage specs. Generic units often run outside rated VA, causing nuisance tripping, overheating, or premature control board failure from unstable 24V output.
• Install Difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Photograph or label wire connections before removal. Replace the inline fuse if blown — a failed transformer sometimes takes the fuse with it.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG9MAA060120ACKA gas furnace. Part number HT01BC116 has been superseded — this listing covers the current OEM-equivalent replacement. Always verify primary/secondary voltage and VA rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.