OEM Carrier 40VA Transformer HT01BC116 for Model GB1AAV024065ACJA

This is the factory OEM replacement transformer (part number HT01BC116) for the Carrier GB1AAV024065ACJA gas furnace. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, and all low-voltage safety controls. When the transformer fails, the entire control circuit goes dead — your thermostat goes blank, the furnace won't respond to any call for heat, and nothing happens when you check the stat. A blown transformer is often the first casualty of a shorted control wire or a miswired thermostat installation.

• Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Compact chassis-mount design | Factory-matched output for Carrier low-voltage control circuits
• OEM vs Generic: This OEM unit is wound to Carrier's exact VA and voltage specifications. Undersized or off-tolerance generic transformers can overheat, trip internal thermal protection, or fail to supply adequate current to multi-stage controls and communicating thermostats.
• 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 (to verify 24V output and check for a shorted secondary before replacement). Always inspect low-voltage wiring for shorts before energizing the new transformer.
• Warranty: 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Designed as the direct OEM drop-in replacement for Carrier model GB1AAV024065ACJA gas furnaces using part number HT01BC116. Confirm your existing transformer's VA rating and primary/secondary voltages on the data plate before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy — same-day shipping on all in-stock orders.