OEM Carrier 40VA Control Transformer HT01BC116 for Model KCABAKCBBA01015TG

This OEM control transformer (part number HT01BC116) is the factory-specified replacement for the Carrier KCABAKCBBA01015TG air handler unit. The transformer steps line voltage (120V) down to 24VAC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, absolutely nothing in the control circuit responds: the thermostat goes blank, the system won't call for heating or cooling, and no fault codes appear on the board because even the board loses its control power.

• Specs: 40VA capacity | Primary: 120VAC | Secondary: 24VAC | Class 2 rated | Factory-matched OEM part number HT01BC116
• OEM vs Generic: This OEM transformer is wound to exact factory VA and voltage specifications. Undersized or off-tolerance generic transformers can overheat, blow internal fuses, or cause erratic thermostat behavior — especially in systems with multiple zone controllers drawing from the same 24V circuit.
• Install difficulty: 2/5 — Shut off all power to the unit at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, needle-nose pliers, multimeter. Label all 24V wire connections before disconnecting the old transformer. Confirm primary and secondary wire leads match your existing wiring diagram inside the access panel.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier KCABAKCBBA01015TG air handler. Verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering. If you're unsure of fitment, our HVAC parts specialists can confirm compatibility before you buy — ships today when ordered by 3PM local time.