OEM Carrier 40VA Control Transformer HT01BC116 for Model PG8JAA048110ABJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8JAA048110ABJA packaged gas furnace. The transformer steps down 120V line voltage to the 24V signal used by the thermostat, control board, gas valve, and all low-voltage control circuit components. When this part fails, the entire control circuit goes dead — the thermostat goes blank, the unit refuses to respond to any call for heat or cooling, and no error codes are produced because the board itself has no power.

• Specs: 120V primary | 24V secondary | 40 VA rated | Leads connection type | Factory-matched output tolerance for reliable low-voltage control operation
• OEM vs Generic: This is a genuine Carrier OEM transformer (Part# HT01BC116), wound and tested to factory specifications. Generic alternatives may carry mismatched VA ratings or loose terminal leads that accelerate failure and void equipment warranties.
• Install Difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, needle-nose pliers. Photograph all wiring connections before removal. Typical job time: 20–30 minutes.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JAA048110ABJA packaged gas furnace. Always verify the part number on your existing transformer's label and cross-reference the 120V/24V/40VA ratings on the unit's wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment before you buy.