OEM Carrier Transformer 120V–24V 40VA for Model PG9YAA036080ABSS

This OEM step-down transformer (part number HT01BC117) is the factory-specified replacement for the Carrier PG9YAA036080ABSS gas furnace. The transformer converts 120V line voltage to the 24V signal required to power the control board, thermostat circuit, and all low-voltage components throughout the system. When this part fails, the entire control circuit goes dead — the thermostat goes blank, the board shows no activity, and the system will not initiate a heating cycle under any condition.

• Specs: Primary: 120V AC | Secondary: 24V AC | Output: 40VA | Direct OEM replacement for part number HT01BC117 | Factory-matched wiring leads
• OEM vs Generic: OEM transformers are wound and insulated to Carrier's exact VA rating and thermal specifications. Undersized or off-brand transformers can sag voltage under load, causing nuisance lockouts, board brownouts, and premature contactor failure.
• Install difficulty: 2/5 — Disconnect power at the breaker and confirm with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all wiring connections before removal to ensure correct reinstallation.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Direct OEM fit for Carrier model PG9YAA036080ABSS gas furnace. Always verify your existing transformer's voltage and VA rating on the unit's data plate before ordering to confirm fitment. Have questions about compatibility? Our HVAC parts specialists verify fitment before you order — contact us today.