OEM Carrier Furnace Transformer 120V-24V 40VA for Model PG8MAA060090AAJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8MAA060090AAJA gas furnace. The transformer steps down the 120V line voltage to the 24V signal used by the thermostat, control board, gas valve, and all low-voltage control circuits. When it fails, nothing in the system responds — the furnace will not call for heat, fans won't activate, and the control board receives no power. A failed transformer is often misdiagnosed as a board failure, making correct identification critical before replacement.

• Specs: 120V primary | 24V secondary | 40VA rating | 50/60 Hz | Single phase | Wire lead connections | Replaces OEM part number HT01BC116 (superseded by HT680054)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 factory VA and voltage tolerances. Undersized or off-spec generic transformers can overload, blow the 3A fuse, or deliver low secondary voltage that causes erratic thermostat or board behavior.
• Install difficulty: 2/5 — Turn off all power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label all low-voltage wires before disconnecting and confirm 24VAC output with a meter after installation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Fits Carrier model PG8MAA060090AAJA gas furnace. This part supersedes original OEM part number HT01BC116 — the current shipping replacement is HT680054. Verify primary voltage (120V) on your unit's data plate before ordering. Our team is available to confirm fitment before you buy.