OEM Carrier Furnace Transformer 40VA 120V-24V for Model PG8MAA036110ABJA

This OEM step-down control transformer is the factory-authorized replacement for the Carrier PG8MAA036110ABJA gas furnace. The transformer converts 120V line voltage to the 24V AC signal that powers every low-voltage component in your system — thermostat, gas valve, inducer relay, and control board. When it fails, the entire low-voltage control circuit goes dark: the thermostat appears dead, the furnace won't respond to a heat call, and nothing works. It is often the first component to check when your system shows zero activity at the thermostat.

• Specs: Primary Voltage: 120V AC | Secondary Voltage: 24V AC | VA Rating: 40VA | Frequency: 60 Hz | Mounting: Foot mount | Connection: Wire leads with insulated female quick-connect terminals
• OEM vs Generic: This is the genuine OEM Carrier transformer built to exact factory tolerances. Generic aftermarket transformers are frequently misrated in VA output, causing premature failure of downstream low-voltage components including the control board and gas valve. OEM is always the safer choice.
• Install Difficulty: 2/5 — Turn off all power at the breaker and confirm 0V before touching wiring. Photograph all wiring connections before disconnecting. Tools needed: flathead and Phillips screwdrivers, nut driver, multimeter. Test 24V output at the R and C terminals on the control board after install to confirm operation.
• Warranty: 1-year OEM manufacturer warranty. In stock — ships same business day from our warehouse.

Compatibility: Replaces OEM part number HT01BC116 and its factory-updated successor HT680054. Designed for the Carrier PG8MAA036110ABJA gas furnace and other Carrier, Bryant, and Payne models sharing the same 40VA 120V/24V transformer specification. Always verify your unit's data plate voltage and VA requirements before ordering. Need help confirming fit? Our HVAC parts specialists verify compatibility before you buy — reach out today and get your furnace back online fast.