OEM Carrier 40VA Control Transformer HT01BC117 for Model PG9YAB036060AAAA

This is the factory OEM replacement control transformer for the Carrier PG9YAB036060AAAA gas furnace. The transformer steps down line voltage (120V) to the 24V signal used by your thermostat, control board, gas valve, and all low-voltage safety circuits. When this part fails, the entire control circuit goes dead — your thermostat goes blank, the furnace won't respond to any call for heat, and no fault codes appear because there's no power to generate them. Replacing the transformer is one of the most cost-effective repairs in furnace diagnostics.

• Specs: 40VA capacity | 120V primary / 24V secondary | Step-down transformer | OEM part number HT01BC117 (also cross-references BE161840GDD)
• OEM vs Generic: This is a factory-matched OEM unit built to exact Carrier tolerances. Generic aftermarket transformers often run at lower VA ratings or use thinner windings, causing premature thermal cutout trips and intermittent control failures — especially in high-demand heating seasons.
• Install difficulty: 2/5 — Shut off power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Label or photograph all wiring connections before disconnecting the old unit. Typical job time: 20–30 minutes.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Verified OEM fit for Carrier PG9YAB036060AAAA gas furnaces. Also fits select PG9YAA, PG9MTAV, and 58HDV/58HDX series models — confirm your model and data plate before ordering. Need fitment verification? Our HVAC parts specialists are standing by. Order now and your part ships today.