OEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG8UAA024065ACJA (HT01BC116)

This OEM step-down transformer is the factory-specified replacement for the Carrier PG8UAA024065ACJA gas furnace, cross-referenced under part number HT01BC116 (current OEM successor: HT680054). The transformer converts 120V line voltage down to 24V AC to power the low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When this part fails, the entire control circuit goes dark: the thermostat goes blank, nothing responds to a call for heat, and the furnace will not attempt to start. Replacing it restores 24V to all downstream components immediately.

• Specs: 120V Primary | 24V Secondary | 40VA Rating | 60 Hz | Single Phase | Foot-mount configuration | Wire lead connections with insulated female quick-connect terminals
• OEM vs Generic: This is a genuine OEM Carrier replacement (or direct OEM-authorized successor), manufactured to factory voltage and VA tolerances. Generic transformers are often rated at loose tolerances, risking under-voltage to sensitive control boards and premature failures — especially in multi-stage furnace applications.
• Install Difficulty: 2/5 — Shut off power at the breaker and confirm 0V with a multimeter before touching any wiring. Label or photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. After installation, verify 24V between R and C terminals on the control board before restoring full operation.
• Warranty: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Engineered for Carrier model PG8UAA024065ACJA gas furnaces. Part number HT01BC116 has been superseded by OEM part HT680054 — both are fulfilled as the current factory replacement and are direct drop-in fits. Also replaces: HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, HT01AA012, HT01AQ110, 322666-701, B1810113. Verify your unit's data plate voltage requirements before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy.