OEM Carrier 40VA Control Transformer HT01BC116 for Model GB1AAV024065ABJA

This is the factory OEM replacement control transformer for the Carrier GB1AAV024065ABJA gas furnace. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, control board, gas valve, and all safety switches. When it fails, nothing in the system responds: the thermostat goes dark, the furnace won't fire, and no error codes appear because even the control board has lost its power source. If you've already confirmed 120V at the primary but zero volts at the secondary, this transformer is your fix.

• Specs: 120V primary | 24V secondary | 40VA rating | OEM part number HT01BC116 | Factory-matched wire leads and mounting configuration
• OEM vs Generic: OEM Carrier transformers are wound to exact VA and voltage tolerances for this furnace's control circuit load. Undersized or off-spec generic transformers can overheat, trip their internal fuse prematurely, or deliver unstable 24V that causes nuisance lockouts and erratic board behavior.
• Install difficulty: 2/5 — Shut off power at the breaker and disconnect the furnace before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper, wire nuts or spade connectors. Always verify 120V is absent before touching the primary wiring. Label all leads before disconnecting.
• Warranty: 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier GB1AAV024065ABJA gas furnace. Verify your existing transformer's primary voltage (120V), secondary voltage (24V), and VA rating (40VA) against your unit's data plate before ordering. OEM part number HT01BC116 cross-references directly to this unit. Our fitment team is available to confirm compatibility before you place your order — reach out before you buy if you have any doubts.