OEM Carrier Transformer 40VA 120V/24V for Model HGRH50HJ441647

This is the OEM factory-replacement control circuit transformer (part number HT01BD242) for the Carrier HGRH50HJ441647. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — the thermostat displays nothing, the system refuses to respond to any call for heating or cooling, and no low-voltage components operate. It is often the first part to inspect when a system appears completely dead despite having line voltage at the unit.

• Specs: Input 120V AC | Output 24V AC | 40VA rated | OEM part number HT01BD242 | Factory-matched for Carrier HGRH50HJ441647
• OEM vs Generic: OEM transformers use factory-wound cores and meet exact VA ratings, preventing nuisance tripping and premature failure under real-world load. Generic units often run undersized VA, causing overheating when multiple 24V loads energize simultaneously.
• Install Difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 0V at the primary leads before touching any wiring. Note wire colors and terminal labels before disconnecting the old unit.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier HGRH50HJ441647. Always confirm input/output voltage and VA rating on your existing transformer's data label before ordering. If you are unsure of fitment, our HVAC parts specialists are available to verify compatibility before you purchase — same-day shipping on all in-stock orders.