OEM Carrier Transformer 40VA 120V/24V for Model PG9MAB048060ACSA

This OEM step-down transformer (part number HT01BC116) is the factory-specified replacement for the Carrier PG9MAB048060ACSA gas furnace. The transformer converts 120V line voltage to the 24V AC signal required to power the control board, thermostat circuit, and all low-voltage safety controls. When this component fails, the entire control circuit goes dark — your thermostat shows no response, the furnace won't fire, and no fault codes are generated because the board itself has no power.

• Specs: 120V primary input | 24V secondary output | 40VA rating | Direct OEM replacement for part number HT01BC116 | Factory-matched terminal configuration
• OEM vs Generic: This is a genuine OEM Carrier transformer built to exact VA and impedance specifications. Generic transformers with under-rated VA can sag under load, causing erratic board behavior, nuisance lockouts, and premature control board failure.
• Install Difficulty: 2/5 — Power down and lock out the unit at the disconnect before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all low-voltage wiring connections before disconnecting. Note wire colors on both primary and secondary terminals.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG9MAB048060ACSA gas furnace. Confirm your existing transformer's primary voltage (120V), secondary voltage (24V), and VA rating on the unit's data plate or existing transformer label before ordering. For fitment questions, our HVAC parts specialists are standing by to verify compatibility before you buy — order with confidence and get back to comfort fast.