OEM Carrier Furnace Control Transformer 120V-24V 40VA — Replaces HT01BC116 for Model PG8MAA048110AAJA

This OEM step-down control transformer is the factory-specified replacement for the Carrier PG8MAA048110AAJA gas furnace. It converts 120V line voltage down to the 24V signal required to power every low-voltage control circuit in your system — including the thermostat, gas valve, inducer relay, and control board. When this transformer fails, the furnace loses all 24V control power: nothing responds, the thermostat goes blank, and the system is completely inoperative. Part number HT01BC116 has been superseded by the current OEM part HT680054, which is a direct drop-in replacement with identical electrical specifications.

• Specs: Primary Voltage: 120 VAC | Secondary Voltage: 24 VAC | VA Rating: 40VA | Frequency: 50/60 Hz | Phase: Single | Compact 3" × 2-2/16" × 2" footprint
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to factory-exact tolerances. Off-brand transformers frequently underperform at rated VA, causing nuisance tripping of 3A fuses and premature control board failures. Do not compromise the heart of your furnace's control circuit.
• Install difficulty: 2/5 — Shut off power at the breaker and confirm 0V at the transformer primary before touching any wiring. Label all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, non-contact voltage tester. Average install time: 20–30 minutes.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before the daily cutoff.

Compatibility: Designed for the Carrier PG8MAA048110AAJA gas furnace. Also replaces legacy part numbers HT01BC116, HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, HT01AA012, HT01AQ110, and HT01CT210 across Carrier, Bryant, and Payne furnace platforms. Always verify your unit's data plate voltage requirements before ordering. Our parts specialists are available to confirm fitment — order with confidence and get your furnace back online today.