OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8MAA024045ADJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8MAA024045ADJA packaged gas furnace. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, gas valve, control board, and contactor coil. When it fails, nothing works: the thermostat goes blank, the system is completely unresponsive, and you may measure zero volts at the R/C terminals on the control board. Replacing the transformer is one of the most cost-effective repairs in HVAC service.

• Specs: 40VA output | 120V primary / 24V secondary | Industry-standard footprint | Factory-matched OEM part number HT01BC116
• OEM vs Generic: This is a genuine Carrier OEM transformer, wound to exact VA and voltage tolerances. Generic units can run under-rated VA, causing nuisance tripping of the internal fuse or premature failure under full control-circuit load.
• Install Difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdriver, multimeter, wire nuts or spade connectors. Always verify 24V output before closing the panel. Check for a shorted load (stuck contactor, grounded wiring) before installing — a shorted secondary will blow the new transformer immediately.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered and tested for the Carrier PG8MAA024045ADJA packaged gas furnace. Confirm your existing transformer's VA rating and primary/secondary voltages on the data plate or wiring diagram inside the unit before ordering. Our HVAC parts specialists are standing by to verify fitment — no guesswork required.