OEM Carrier Transformer 40VA 120V/24V for Model N6A48NG480109

This is the genuine OEM replacement transformer (part# HT01BC116) for the Carrier N6A48NG480109 packaged unit. The transformer steps down 120V line voltage to the 24V control circuit voltage that powers your thermostat, contactor coil, and all low-voltage control components. When this transformer fails, absolutely nothing in the control system responds — the thermostat goes blank, the unit will not energize, and the system appears completely dead. A failed transformer is often misdiagnosed as a bad control board, making correct part identification critical before purchasing more expensive components.

• Specs: 40VA rating | 120V primary / 24V secondary | OEM part number HT01BC116 | Factory-matched output for full control circuit stability
• OEM vs Generic: OEM transformers are wound to exact factory VA ratings, ensuring stable 24V output under full load. Undersized generic transformers can sag under load, causing erratic contactor chatter, nuisance lockouts, and premature control board failure.
• Install difficulty: 2/5 — Disconnect power at the disconnect box and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all low-voltage wires before removing the old unit.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock units ship same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier N6A48NG480109 packaged unit. Verify your existing transformer's VA rating and primary/secondary voltages on the data plate or wiring diagram inside the unit cabinet before ordering. Our parts specialists are available to confirm fitment prior to purchase — same-day shipping available on all in-stock orders.