OEM Carrier Control Transformer 40VA 120V/24V for Model N6D48NG480106

This is the factory OEM replacement control transformer (part number HT01BC116) for the Carrier N6D48NG480106 packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers the entire control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, absolutely nothing responds: the thermostat goes blank, the system won't call for heating or cooling, and no outputs energize. If you've already confirmed 120V supply at the unit but read 0V on the secondary (24V) side, this transformer is the culprit.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BC116 | Spade or wire-lead termination (factory-matched)
• OEM vs Generic: The OEM HT01BC116 transformer is wound to exact VA and impedance tolerances for the Carrier control circuit. Undersized or off-spec generic transformers can overheat, trip internal thermal cutoffs, and cause nuisance lockouts — especially when multiple 24V accessories (humidifiers, zone boards) are present.
• Install difficulty: 2/5 — Disconnect power at the disconnect box before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all low-voltage wires before removal. Confirm 0V on secondary before declaring transformer failed.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our stocked warehouse.

Compatibility: Designed for the Carrier N6D48NG480106 packaged unit. Always verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's wiring diagram before ordering — some configurations may use a different VA rating. Our parts team is available to confirm fitment prior to purchase. Order today and your part ships same business day.