OEM Carrier Control Transformer 40VA for Model GB1AAV060111ADJA

This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier GB1AAV060111ADJA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, the thermostat goes completely dark, no calls for heat or cooling are processed, and the system appears totally dead despite having line voltage at the unit.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Direct OEM replacement for part# HT01BC116 | Factory-matched output tolerance for reliable control circuit operation
• OEM vs Generic: The OEM HT01BC116 transformer is wound to Carrier's exact VA and voltage specifications. Generic transformers often underrate their VA capacity, causing overheating under normal load and premature failure — especially when multiple 24V accessories (humidifiers, zoning boards) share the circuit.
• Install Difficulty: 2/5 — Shut off line voltage at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label or photograph all low-voltage wiring before disconnecting terminals. The transformer typically mounts to the blower compartment panel with two screws.
• Warranty: 1-year OEM factory warranty against defects. Orders placed before 3PM ship same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier GB1AAV060111ADJA gas furnace. Confirm your existing transformer's VA rating and primary/secondary voltages on the data plate or component label before ordering. If you're unsure of fitment, our HVAC parts specialists verify compatibility before you buy — no guesswork, no returns.