OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8MAA036110ACJA

This OEM 40VA control transformer is the factory-specified replacement for the Carrier PG8MAA036110ACJA gas furnace. Its job is straightforward but absolutely critical: it steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — thermostat, control board, gas valve, and zone controls. When the transformer fails, nothing downstream works. Symptoms include a blank thermostat display, a furnace that won't respond to any call for heat or cooling, and a system that appears completely dead even though line power is present.

• Specs: 40VA rating | 120V primary / 24V secondary | Direct OEM replacement | Factory-matched impedance and thermal overload protection for the PG8MAA036110ACJA control circuit
• OEM vs Generic: OEM transformers (HT01BC116) are wound and rated specifically for Carrier's control circuit load. Generic units often carry looser VA and voltage tolerances, which can cause nuisance board resets, erratic relay behavior, or premature secondary-side burnout.
• Install difficulty: 2/5 — Shut off 120V power at the breaker and confirm voltage is dead with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire connectors. Photograph existing wiring connections before removal. Label primary and secondary wires carefully before re-terminating.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Engineered for Carrier model PG8MAA036110ACJA packaged gas furnace. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate before ordering to confirm fitment. Have questions? Our HVAC parts specialists verify fitment before you order — call or chat today.