OEM Carrier Control Transformer 40VA 120V/24V for Model C48A302061

This OEM replacement control transformer (part number HT01BD236) is the factory-specified unit for the Carrier C48A302061 packaged unit. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the result is total loss of control power: your thermostat goes blank, the system refuses to respond to any call for heating or cooling, and no fault codes can even be generated. A failed transformer is often misdiagnosed as a thermostat or control board failure, making correct identification critical before replacing more expensive components.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched output for reliable low-voltage circuit performance
• OEM vs Generic: This OEM transformer is wound to exact Carrier factory specifications, ensuring proper VA capacity and voltage regulation. Generic transformers can run underrated, causing nuisance trips on the integral thermal overload and leaving you chasing an intermittent no-power complaint.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after installation). Label or photograph all wire connections before removal. Mount new transformer securely to prevent vibration fatigue on terminals.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before cutoff ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier C48A302061 packaged unit. Always verify primary voltage and VA rating on your unit's data plate before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you purchase — no guesswork, no return hassle.