OEM Carrier Transformer 40VA 120V to 24V for Model GB1AAV060155AFJA

This OEM replacement transformer (part number HT01BC116) is the factory-specified control circuit transformer for the Carrier GB1AAV060155AFJA gas furnace. The transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, control board, gas valve, and all low-voltage control components. When the transformer fails, the entire control circuit goes dead — your thermostat goes blank, nothing responds, and the system will not attempt ignition. If you have 120V at the furnace but 0V at the secondary terminals, this transformer is your fix.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BC116 | Replaces factory-installed unit exactly
• OEM vs Generic: This is the genuine Carrier OEM transformer wound to exact VA and voltage tolerances. Generic transformers frequently underperform under full load — powering a contactor, gas valve, and control board simultaneously — leading to voltage sag and nuisance lockouts. The OEM unit is built to sustain continuous 40VA draw without thermal degradation.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flat-head and Phillips screwdrivers, needle-nose pliers, multimeter. Label and photograph all low-voltage wiring before disconnecting. Swap wire-for-wire on primary and secondary terminals and restore power to test.
• Warranty: 1-year OEM factory warranty against defects. In stock in our warehouse — ships same business day when ordered before 3 PM.

Compatibility: Designed and factory-matched for the Carrier GB1AAV060155AFJA gas furnace. Verify the existing transformer's VA rating and primary/secondary voltages on the unit's data plate before ordering to ensure proper fitment. Our parts specialists are available to confirm compatibility before you buy — no guesswork required.