OEM Carrier 40VA Control Transformer 120V–24V (HT01BC116) for Model PG8UAA060135ABJA

This OEM Carrier control transformer is the factory-specified replacement for the Carrier PG8UAA060135ABJA gas furnace. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat circuit, control board, gas valve, and every low-voltage safety control in the system. When this transformer fails — due to a shorted control wire, a failed component drawing excess current, or simple age — the entire furnace goes dead: no thermostat response, no ignition attempt, nothing. Replacing it is one of the most cost-effective furnace repairs available.

• Specs: 40VA rating | 120V primary / 24V secondary | 50/60 Hz | Single phase | Compact 3" × 2" × 2" housing | Wire-lead connections
• OEM vs Generic: This OEM unit is wound to exact Carrier factory tolerances, ensuring the full 40VA capacity under load. Undersized or off-tolerance generic transformers can overheat, trip their internal thermal fuse, or fail prematurely — especially if a minor wiring fault exists downstream.
• Install difficulty: 2/5 — Always shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, multimeter (to confirm 24V output after install). Photograph or label all wire connections before disconnecting. Note: if a transformer fails repeatedly, inspect low-voltage wiring for shorts before installing the new unit.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 5 PM local time.

Compatibility: Direct OEM replacement for Carrier model PG8UAA060135ABJA gas furnace. OEM part number HT01BC116 has been superseded by HT680054 — both are fulfilled as the current production unit. Also compatible with Bryant and Payne furnaces sharing the same transformer specification. Always verify primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — ships today.