OEM Carrier 40VA Control Transformer for Model PG9MAB036060ACSA

This OEM replacement transformer (part number HT01BC116) is the factory-specified 120V-to-24V step-down transformer for the Carrier PG9MAB036060ACSA gas furnace. The transformer powers the entire 24V control circuit — including the thermostat, gas valve, inducer relay, and control board logic. When it fails, nothing in the system responds: the furnace will not ignite, the thermostat goes dark, and there will be no call-for-heat response whatsoever. A failed transformer is often misdiagnosed as a bad control board, making correct part identification critical.

• Specs: Input: 120VAC | Output: 24VAC | VA Rating: 40VA | Replaces OEM Part Number: HT01BC116 | Factory-matched winding and terminal configuration
• OEM vs Generic: This is a genuine OEM Carrier transformer built to factory winding specs and thermal protection ratings. Generic transformers may carry inconsistent VA ratings and lack the same internal thermal fuse protection, risking repeat failures or downstream board damage.
• Install Difficulty: 2/5 — Shut off all power to the furnace before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all wiring connections before disconnecting leads.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG9MAB036060ACSA gas furnace. Always verify your unit's data plate voltage and VA requirement before ordering. Our HVAC parts specialists are available to confirm fitment before you buy — contact us anytime.