OEM Carrier Control Transformer 40VA 120V to 24V for Model C48A302762

This OEM replacement transformer is the factory-specified control circuit transformer for the Carrier C48A302762 packaged unit. Its job is to step down line voltage (120V) to the 24V low-voltage signal that powers your thermostat, contactor coil, and all control board logic. When it fails, the result is total control circuit loss — your thermostat goes blank, the system won't respond to any commands, and no staging or safety functions can operate. OEM part numbers HT01BD236 and HT01BD702 are both factory-approved replacements for this application.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | Class 2 control transformer | Designed to factory tolerance for the C48A302762 control circuit
• OEM vs Generic: OEM transformers are wound to the exact VA rating and insulation class required by Carrier engineering. Undersized or off-tolerance generic units can overheat, trip thermal cutoffs, or fail to hold voltage under load — causing intermittent lockouts that are difficult to diagnose.
• Install difficulty: 2/5 — Disconnect power and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after install). Photograph all wire connections before disconnecting. Wire leads typically connect to spade or screw terminals on the control board.
• Warranty: 1-year OEM factory warranty. In stock and ships the same business day from our warehouse.

Compatibility: Engineered for the Carrier C48A302762 packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Always verify your existing transformer's VA rating and primary/secondary voltages against your unit's wiring diagram before ordering. Need fitment confirmation? Our HVAC parts team is available to verify compatibility before you buy.