OEM Carrier 40VA Control Transformer for Model PG9MAA036060ADKA

This OEM replacement control transformer (Part# HT01BC116) is the factory-specified unit for the Carrier PG9MAA036060ADKA gas furnace. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, gas valve, and all low-voltage control circuits. When this component fails, the entire control system goes dark — the thermostat shows no power, the furnace won't respond to any calls for heat or cooling, and nothing operates. It is often the first component to check when a system is completely unresponsive despite a confirmed power supply.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory-matched output for precise low-voltage circuit protection
• OEM vs Generic: This OEM transformer (HT01BC116) is wound and tested to Carrier's exact VA and voltage tolerances, ensuring your control board and gas valve receive clean, stable 24V. Generic transformers can drift under load, causing nuisance lockouts or premature board failure.
• Install Difficulty: 2/5 — Shut off power at the breaker and confirm zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wiring before disconnecting terminals.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier PG9MAA036060ADKA packaged gas furnace. Always verify your existing transformer's VA rating and primary/secondary voltage from the unit data plate before ordering to ensure a direct drop-in fit. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.