OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8JAA048110ACJA

This OEM control transformer (part number HT01BC116) is the factory-specified replacement for the Carrier PG8JAA048110ACJA packaged gas heating and cooling unit. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, gas valve, contactor coil, and control board. When this part fails, the system goes completely unresponsive: the thermostat goes blank, the unit won't heat or cool, and there is typically no 24V output measurable at the secondary terminals.

• Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Factory-matched OEM replacement for Carrier packaged gas units | Clip or screw-mount bracket included
• OEM vs Generic: OEM transformers from Carrier use precision-wound coils with exact VA ratings and insulation class ratings matched to the original design. Generic units are often underrated in real-world VA output, leading to nuisance tripping of the internal thermal overload — especially when multiple 24V accessories are on the circuit.
• Install difficulty: 2/5 — Shut off all power to the unit at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to confirm 0V before touching wiring and to verify 24V output after install). Photograph all wire connections before disconnecting. Total replacement time: approximately 20–30 minutes.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered specifically for the Carrier PG8JAA048110ACJA 4-ton packaged gas/electric unit (110 MBH heating). Always verify the primary and secondary voltage ratings on the existing transformer's data label before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy — reach out via chat or phone.