OEM Carrier Control Transformer 40VA 120V/24V for Model C48A806064

This is the genuine OEM replacement control transformer (part number HT01BD702) for the Carrier C48A806064 packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and all safety switches. When this transformer fails, the entire control circuit goes dark: your thermostat display may go blank, the system will not respond to any calls for heating or cooling, and nothing will operate despite line power being present at the unit.

• Specs: Input: 120V AC | Output: 24V AC | 40VA rating | OEM part number HT01BD702 | Factory-matched for Carrier C48A806064 packaged systems
• OEM vs Generic: This factory OEM transformer is wound and insulated to Carrier's exact specifications, ensuring proper VA capacity and protection against overload burnout. Generic aftermarket transformers are frequently undersized in VA output, which causes premature failure when multiple 24V loads draw simultaneously.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after installation). Label and photograph all low-voltage wiring before disconnecting the old transformer.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Designed as a direct OEM replacement for the Carrier C48A806064 packaged unit. Always verify your existing transformer's input voltage, output voltage, and VA rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence and get back to comfort fast.