OEM Carrier Transformer 120V–24V 40VA for Model PG9MAA060100AFKA

This is the factory OEM replacement transformer (part number HT01BC116) for the Carrier PG9MAA060100AFKA gas furnace. The transformer steps down the incoming 120V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage control circuits. When this component fails, the entire control circuit goes dark — the thermostat shows no response, the furnace will not heat, and no error codes appear because the board itself has no power to generate them.

• Specs: 120V primary | 24V secondary | 40VA rating | Factory-matched OEM tolerances for the PG9MAA060100AFKA platform
• OEM vs Generic: The OEM HT01BC116 transformer is wound and rated to exact Carrier factory specifications. Generic transformers may carry inconsistent VA ratings or inferior insulation class, risking under-voltage faults that cause nuisance lockouts or premature control board failure.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after install). Label or photograph all low-voltage wiring before disconnecting terminals.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Engineered specifically for the Carrier PG9MAA060100AFKA gas furnace. Always verify your unit's data plate and existing transformer VA rating before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — no guesswork, no returns.