OEM Carrier 40VA Control Transformer for Model GB1AAV060135ABJA — Part HT01BC116

This OEM control transformer (part number HT01BC116) is the factory-specified replacement for the Carrier GB1AAV060135ABJA gas furnace. The transformer steps down line voltage (120V) to the 24V signal required by your thermostat, control board, gas valve, and all low-voltage control circuit components. When the transformer fails, the entire control circuit loses power — your thermostat goes blank, the system won't respond to any calls for heat or cooling, and nothing operates. It is often the first component to suspect when absolutely nothing works and fuses or breakers appear intact.

• Specs: 40VA rating | 120V primary input | 24V secondary output | Direct OEM replacement | Part number HT01BC116 — factory-matched to Carrier GB1AAV060135ABJA
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances specified by Carrier engineering. Undersized or off-tolerance generic units can overheat, blow the low-voltage fuse repeatedly, or fail prematurely — leaving you chasing a symptom rather than fixing the root cause.
• Install difficulty: 2/5 — Shut off all power to the furnace at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after installation). Label or photograph all wire connections before disconnecting the old transformer.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier GB1AAV060135ABJA gas furnace. Verify your existing transformer's VA rating and voltage markings against your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you purchase — no guesswork required. Order now and receive same-day shipping on in-stock OEM parts.