OEM Carrier Furnace Transformer 120V/24V 40VA for Model PG9YAB036080AAAA

This OEM control transformer is the factory-specified replacement for the Carrier PG9YAB036080AAAA 80% AFUE packaged gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the furnace will not respond to the thermostat, will not attempt ignition, and will show no signs of life at the board. A failed transformer is one of the most commonly overlooked causes of a completely non-responsive furnace.

• Specs: 120V primary / 24V secondary | 40VA output rating | Foot-mount configuration | OEM part number HT01BC117 (superseded by HT680056) | Cross-reference: BE161840GDD
• OEM vs Generic: This OEM transformer is wound and encapsulated to Carrier's exact factory specification, ensuring correct impedance, thermal protection, and VA headroom. Generic aftermarket transformers often underperform at peak load, causing nuisance lockouts or premature board damage.
• Install difficulty: 2/5 — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 120V input and 24V output with a meter before and after replacement. Photograph all low-voltage wiring before disconnecting.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG9YAB036080AAAA packaged gas furnace and confirmed cross-compatible with several PG9YAB and PG9YAA series models. Always verify the OEM part number printed on your existing transformer before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy — reach out today and we'll ship this out to you fast.