OEM Carrier Furnace Transformer 120V-24V 40VA for Model PG8MAA060155ADJA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG8MAA060155ADJA gas furnace. It converts 120V line voltage down to 24V AC to power every low-voltage control circuit in the system — including the thermostat, control board, gas valve, and zone controls. When this transformer fails, the furnace goes completely silent: no thermostat response, no inducer start, and no error codes. If you're measuring 0V between the R and C terminals on the control board, a failed transformer is the first component to suspect.

• Specs: Input 120V AC | Output 24V AC | 40VA rating | Foot-mount configuration | Wire lead connections | 60 Hz | Includes 3A fuse protection
• OEM vs Generic: This OEM unit is factory-matched to Carrier's exact VA rating and mounting footprint. Generic transformers are frequently mismatched in VA output, leading to overheating or nuisance tripping of the control board's fuse — a problem confirmed by field installers. OEM ensures a drop-in fit with no modification.
• Install difficulty: 2/5 — Shut off power at the breaker and confirm zero voltage before disconnecting leads. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Photograph or label all wire connections before removal. Check and replace the low-voltage fuse on the control board as a best practice during this repair.
• Warranty: 1-year OEM factory warranty. In stock — ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8MAA060155ADJA gas furnace. OEM part number HT01BC116 has been superseded by Carrier part number HT680054 — both are factory-authorized and interchangeable. Also fits many Carrier, Bryant, and Payne furnace models sharing the 120V-24V 40VA transformer specification. Verify your unit's data plate and existing transformer ratings before ordering. Need help confirming fitment? Our HVAC parts team verifies compatibility before you buy.