OEM Carrier Furnace Transformer 120V/24V 40VA for Model PG9YAA060100ABSS

This OEM control transformer (part number HT01BC117) is the factory-specified replacement for the Carrier PG9YAA060100ABSS gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When this transformer fails, the furnace goes completely unresponsive: the thermostat shows no call being answered, the board has no power, and the system will not attempt ignition. A failed transformer is often misdiagnosed as a bad control board, making accurate diagnosis critical before ordering.

• Specs: 120V primary | 24V secondary | 40VA rating | Foot-mounted / chassis mount | OEM part number HT01BC117 (also crosses to HT01BC117A, BE161840GDD)
• OEM vs Generic: This is a genuine OEM-spec transformer matched to Carrier factory tolerances. Generic 40VA transformers often run at the edge of their rated VA, causing nuisance tripping of the internal thermal fuse under normal furnace load — especially in systems with zone valves or humidifiers drawing additional VA.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify with a multimeter before servicing. Label and photograph all 24V secondary wiring before removal. Tools needed: flathead and Phillips screwdrivers, nut driver, multimeter. Transformer is foot-mounted and typically secured with two screws inside the furnace cabinet.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG9YAA060100ABSS gas furnace. Cross-references include HT01BC117A and Basler Electric BE161840GDD. Always verify primary voltage (120V), secondary voltage (24V), and VA rating (40VA) against your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists verify compatibility before every order — no guesswork.