OEM Carrier Control Transformer 40VA 120V/24V for Model CGH10016D — Part HT01BC116

This OEM Carrier transformer (part HT01BC116) is the factory-specified replacement for the Carrier CGH10016D unit. The transformer steps down line voltage (120V) to low-voltage control power (24V) to operate the thermostat, control board, contactor coil, and all safety circuits. When this part fails, the entire control circuit goes dead — the thermostat goes blank, the system produces no response to calls for heating or cooling, and no diagnostic codes are generated because the board itself has no power.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BC116 | Factory-matched for Carrier CGH10016D control circuit requirements
• OEM vs Generic: This factory OEM transformer is wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or off-tolerance generic transformers can cause nuisance tripping, blown fuses, or premature control board failure — making OEM the only recommended choice.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify voltage is off with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wiring connections before removing the old transformer.
• Warranty: 1-year OEM factory warranty. Orders ship same business day when placed before cutoff from our stocked warehouse.

Compatibility: Designed for the Carrier CGH10016D unit. Always verify your existing transformer's VA rating and primary/secondary voltages on the data plate before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you purchase — don't guess on a control-circuit component.