OEM Carrier Control Transformer HT01BC117 for Model PG9YAA036080ACSS

This OEM control transformer (part number HT01BC117) is the factory-specified replacement for the Carrier PG9YAA036080ACSS gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat circuit, control board, gas valve, and all low-voltage components. When this part fails, the furnace will appear completely unresponsive — the thermostat goes dark, no ignition sequence initiates, and no fault codes appear because the control board itself has no power. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect the 24V circuit before installing a replacement.

• Specs: Input 120V AC | Output 24V AC | Typical 40VA rating | Factory-matched impedance and thermal protection | Direct OEM replacement for Carrier PG9YAA036080ACSS
• OEM vs Generic: This OEM unit is wound and rated to Carrier's exact factory specifications, ensuring proper VA output and built-in thermal overload protection. Generic transformers frequently run undersized VA ratings, causing premature failure under normal furnace load.
• Install difficulty: 2/5 — Shut off power at the breaker and disconnect the furnace before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Always verify the 24V secondary side reads correctly before reassembling. Inspect all low-voltage wiring for shorts that may have caused the original failure.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG9YAA036080ACSS gas furnace. Confirm your unit's control voltage and VA requirement on the data plate inside the furnace cabinet before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you buy — no guesswork required.