OEM Carrier Furnace Transformer 40VA 120V/24V for Model PG8MAA060155ACJA (HT01BC116 / HT680054)

This OEM step-down transformer is the factory-specified replacement for the Carrier PG8MAA060155ACJA gas furnace. Originally sold under part number HT01BC116, this component has been updated by Carrier to the current OEM part number HT680054 — a direct drop-in factory replacement supplied in a Carrier-authorized parts box. The transformer converts 120V line voltage down to 24V AC to power all low-voltage control components including the thermostat, gas valve, and control board. When it fails, the result is a completely unresponsive system: the thermostat goes dark, the furnace will not ignite, and no low-voltage signals reach any component downstream.

• Specs: 40VA rating | 120V primary / 24V secondary | 50/60 Hz | Single-phase | Foot-mount | Compact 3" × 2-2/16" × 2" form factor | Wire lead connections
• OEM vs Generic: This is a genuine Carrier OEM unit shipped in a factory-authorized box, matched precisely to the PG8MAA060155ACJA's low-voltage circuit load. Generic transformers may be rated at ±10% VA tolerance, risking undervoltage to the gas valve or control board and causing nuisance lockouts.
• Install difficulty: 2/5 — Shut off power at the breaker and confirm 0V with a multimeter before touching wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before removal. The foot-mount bracket bolts directly into the existing standoffs — no modification required.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.

Compatibility: Engineered for the Carrier PG8MAA060155ACJA gas furnace. This OEM part (HT01BC116, superseded by HT680054) also replaces cross-reference numbers HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, and several others — confirming broad fitment across Carrier, Bryant, and Payne furnace platforms with identical low-voltage circuit requirements. Verify your unit's data plate shows 120V primary control transformer before ordering. Need fitment confirmed? Our team checks compatibility before you buy — order with confidence and get it shipped today.