OEM Carrier 40VA Control Transformer HT01BC116 for Model PG9MAA036040ABKA

This OEM control transformer is the factory-specified replacement for the Carrier PG9MAA036040ABKA gas furnace. The transformer steps down incoming 120V line voltage to the 24V signal required by your thermostat, control board, gas valve, and all low-voltage control circuit components. When this part fails, the entire control circuit goes dead — your thermostat won't respond, the furnace won't ignite, and nothing happens when you call for heat. It is one of the first components to check whenever a furnace shows absolutely no signs of life.

• Specs: 120V primary input | 24V secondary output | 40VA rated | Factory OEM replacement for part number HT01BC116
• OEM vs Generic: This is a genuine OEM Carrier part engineered to exact voltage and VA tolerances for the PG9MAA036040ABKA. Generic transformers may fall outside the ±5% VA tolerance required to properly power the IFC control board without tripping its overcurrent protection.
• Install difficulty: 2/5 — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or push-in connectors. Test secondary voltage output (should read 24–28V AC) before declaring the old transformer failed.
• Warranty: 1-year OEM factory warranty against defects. Orders ship same business day when placed before 3 PM local time.

Compatibility: Designed for the Carrier PG9MAA036040ABKA 80% AFUE gas furnace. Always verify your existing transformer's VA rating and terminal configuration against your unit's data plate before ordering. Our parts specialists are available to confirm fitment — reach out before you buy if you have any questions.