OEM Carrier Transformer 40VA 120V to 24V for Model N6D48NG480201

This is the factory OEM replacement transformer (part number HT01BC116) for the Carrier N6D48NG480201 packaged unit. The transformer steps down 120V line voltage to the 24V signal used by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When the transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any call for heating or cooling, and you may measure zero voltage on the 24V secondary terminals. It is one of the first components to check when nothing works at all.

• Specs: Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01BC116 | Factory-matched to Carrier N6D48NG480201 control circuit requirements
• OEM vs Generic: This is a genuine OEM Carrier transformer wound to exact VA and voltage tolerances. Undersized or off-spec aftermarket transformers can overload under peak demand, blowing the transformer fuse or damaging the control board — a far more expensive repair.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Label and photograph all low-voltage wire connections before disconnecting the old unit.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier N6D48NG480201 packaged unit. Verify your existing transformer's input/output voltage and VA rating on the unit data plate or original transformer label before ordering. Our parts specialists are available to confirm fitment prior to purchase — same-day shipping on all in-stock orders placed before 3 PM.