OEM Carrier 40VA Control Transformer 120V–24V for Model C48A202762

This OEM control transformer is the factory-specified replacement for the Carrier C48A202762 packaged unit. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, nothing works: the thermostat goes dark, the system won't respond to any call for heating or cooling, and you may detect a burning smell or find a blown low-voltage fuse. Replacing the transformer is one of the most cost-effective repairs on any packaged system.

• Specs: 40VA output | Primary: 120V AC | Secondary: 24V AC | Terminal-mount design | Factory-matched for Carrier C48A202762 control circuits | OEM Part Numbers: HT01BD236 / HT01BD702
• OEM vs Generic: This OEM transformer is wound to exact VA and voltage tolerances required by the factory control board. Generic transformers often run outside ±5% tolerance, causing nuisance fuse-blowing, erratic thermostat behavior, and premature board failure — especially under high-demand summer loads.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper, needle-nose pliers. Always verify 0V at primary terminals before touching wiring. Label or photograph all low-voltage connections prior to removal.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier C48A202762 packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Confirm your unit's control circuit voltage (24V secondary) and VA requirement on the data plate before ordering. Our team is available to verify fitment — order with confidence and get back up and running today.