OEM Carrier Furnace Transformer 40VA 120V–24V for Model PG8JAA060090ACJA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG8JAA060090ACJA gas furnace. The transformer converts 120V line voltage down to 24V AC to power all low-voltage control circuit components — including the thermostat, control board, gas valve, and inducer relay. When this transformer fails, the entire control circuit goes dark: the thermostat shows no response, the furnace refuses to start, or the system intermittently loses power mid-cycle. Note: OEM part number HT01BC116 has been superseded by HT680054, the current factory-authorized direct replacement shipped in a Carrier factory-authorized parts box.

• Specs: 40VA rating | 120V primary input | 24V secondary output | 60 Hz | Single phase | Foot-mount configuration | Wire lead connections
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances. Undersized or off-tolerance generic units can overdraw current, trip the furnace's low-voltage fuse, and damage the control board — turning a $50 repair into a $200 one.
• Install difficulty: 2/5 — Shut off power at the breaker and confirm zero voltage before disconnecting leads. Photograph all wiring connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after install). Always check for a blown low-voltage fuse before condemning the transformer.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse.

Compatibility: Direct OEM replacement for Carrier model PG8JAA060090ACJA gas furnace. Also replaces legacy part numbers HT01BC116, HT01BC115, HT01BB126, HT01CT120, HT01BC120, and additional Carrier/Bryant/Payne variants — verify primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before you buy — contact us today and get your furnace back online fast.