OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG9MAB036060LBSA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG9MAB036060LBSA gas furnace. The transformer converts 120V line voltage down to 24V AC to power all low-voltage control circuit components — including the thermostat, control board, gas valve, and inducer relay. When this part fails, the furnace will appear completely unresponsive: the thermostat goes blank, the board shows no activity, and nothing operates. A failed transformer is one of the most common root causes of a total no-heat, no-response condition. OEM part number HT01BC116 has been superseded by the current factory replacement HT680054, which ships in a Carrier factory-authorized parts box and is a direct drop-in replacement.

• Specs: Input: 120V AC | Output: 24V AC | VA Rating: 40VA | Frequency: 60Hz | Mounting: Foot mount | Connection: Wire leads with insulated female connectors
• OEM vs Generic: OEM transformers are wound to exact factory VA tolerances, protecting downstream components like the control board and gas valve from voltage fluctuations. Generic units often run outside ±5% tolerance and can cause nuisance lockouts or shorten board life.
• Install Difficulty: 2/5 — Shut off power and gas before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Verify 24V output across R and C terminals on the control board after installation to confirm correct operation.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG9MAB036060LBSA gas furnace. Superseded part number HT01BC116 is fully replaced by HT680054 — both are covered by this listing. Also cross-references HT01BC115, HT01BC120, HT01BB126, and HT01CT120. Verify your unit's data plate voltage before ordering. Our fitment team is available to confirm compatibility before you buy.