OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8JAA024070ACJA

This OEM control transformer (part number HT01BC116) is the factory-specified replacement for the Carrier PG8JAA024070ACJA packaged gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers the entire control circuit — including the thermostat, gas valve, inducer relay, and ignition board. When it fails, nothing works: no call for heat is processed, the board appears dead, and the system will not attempt to start. A failed transformer is often misdiagnosed as a control board failure, so always verify transformer output voltage first.

• Specs: 120V primary | 24V secondary | 40VA rating | Factory-matched OEM tolerances | Class 2 rated control transformer
• OEM vs Generic: The OEM HT01BC116 is wound and insulated to Carrier's exact VA and thermal specifications. Generic transformers with undersized VA ratings can overheat, blow internal fuses, or cause erratic thermostat behavior — costing far more in callbacks than the price difference.
• Install Difficulty: 2/5 — Shut off all power to the unit before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire nuts or spade connectors. Photograph all wiring connections before disconnecting the old unit.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JAA024070ACJA packaged gas furnace. Verify your unit's control circuit voltage requirements on the data plate before ordering. If you're unsure of fitment, our HVAC parts specialists can confirm compatibility before you buy — same-day shipping available on all in-stock OEM parts.