OEM Carrier Control Transformer 120V–24V 40VA for Model PG9MTAV36075ABSS

This OEM Carrier control transformer (part# HT01BC117) is the factory-specified replacement for the PG9MTAV36075ABSS gas furnace. The transformer steps down line voltage from 120V AC to 24V AC to power the furnace's low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When this component fails, the entire control circuit goes dead: the thermostat shows no response, the furnace does not attempt ignition, and nothing operates. It is often one of the first components to inspect when a furnace appears completely unresponsive.

• Specs: Input 120V AC | Output 24V AC | 40VA rated | Factory OEM part number HT01BC117 | Direct drop-in replacement with no modifications required
• OEM vs Generic: This is a genuine OEM Carrier transformer wound to exact VA and voltage tolerances. Generic transformers can run under-rated VA, causing voltage sag under load that trips the control board or damages the gas valve solenoid over time.
• Install Difficulty: 2/5 — Disconnect power to the furnace before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 24V output after install). Photograph or label all low-voltage wiring before disconnecting. Typical replacement time is 20–30 minutes.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships the same business day from our warehouse.

Compatibility: Engineered as a direct OEM replacement for the Carrier PG9MTAV36075ABSS gas furnace. Always verify your unit's data plate voltage and VA rating before ordering to ensure a correct match. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy — contact us today and get your furnace back online fast.