OEM Carrier Control Transformer 40VA 120V/24V for Model GB1AAV060155ABJA

This OEM replacement transformer (part number HT01BC116) is the factory-specified control circuit transformer for the Carrier GB1AAV060155ABJA gas furnace. The transformer steps down line voltage from 120V to the 24V signal voltage required to power the control board, thermostat, gas valve, and all low-voltage system controls. When the transformer fails, the entire low-voltage control circuit loses power — resulting in a completely unresponsive system, a blank thermostat display, or a furnace that won't respond to any call for heat, even when line power is confirmed present.

• Specs: 40VA rated | 120V primary / 24V secondary | Factory-matched OEM output tolerance | Compact form factor designed for OEM mounting bracket fitment on GB1AAV060155ABJA
• OEM vs Generic: This is the genuine Carrier OEM transformer (HT01BC116), built to exact VA rating and insulation class specifications. Generic substitutes may fall short of the 40VA load capacity required to reliably power all low-voltage accessories simultaneously, leading to premature failure or nuisance tripping.
• Install Difficulty: 2/5 — Disconnect power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connect terminals. Photograph all wiring connections before removal. A blown transformer may indicate a downstream short — inspect low-voltage wiring before energizing the replacement.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders ship same business day from our stocked warehouse.

Compatibility: Engineered as a direct OEM drop-in for the Carrier GB1AAV060155ABJA gas furnace. Confirm your existing transformer's VA rating and primary/secondary voltages on the data plate or existing unit label before ordering. If you are unsure of fitment, our HVAC parts specialists verify compatibility before your order ships — no guesswork required.