OEM Carrier Furnace Control Transformer 40VA 120V/24V for Model PG8JAA024045ACJA

This OEM step-down control transformer is the factory-specified replacement for the Carrier PG8JAA024045ACJA gas furnace. It converts 120V line voltage to the 24V signal required by the thermostat, control board, gas valve, and every other low-voltage component in your system. When this transformer fails — due to a shorted control wire, overloaded secondary, or simply age — absolutely nothing works: no ignition, no blower response, no thermostat communication. Replacing it is one of the fastest, most cost-effective furnace repairs available.

• Specs: 40VA rating | 120V primary | 24V secondary | 50/60 Hz single-phase | Wire lead connections | Replaces OEM part number HT01BC116 (superseded by HT680054)
• OEM vs Generic: OEM transformers are wound to exact VA tolerance, protecting downstream components like the control board from voltage fluctuation. Generic units often have looser tolerances and lack integrated thermal overload protection found in the Carrier-specified part.
• Install difficulty: 2/5 — Shut off power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Photograph all wire connections before disconnecting. Check secondary fuse or fusible link on the control board before condemning the transformer.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship the same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG8JAA024045ACJA gas furnace. This part supersedes original part number HT01BC116 and is also compatible with a wide range of Carrier, Bryant, and Payne furnaces using the same 40VA 120V/24V transformer specification — always verify your unit's data plate voltage and VA rating before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy. Order by 5 PM EST for same-day shipping.