OEM Carrier Control Transformer 40VA 120V to 24V for Model GB1AAV036065AEJA

This OEM replacement control transformer (part# HT01BC116) is the factory-specified unit for the Carrier GB1AAV036065AEJA gas furnace. The transformer steps down 120V line voltage to 24V to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, the result is a completely unresponsive system: your thermostat goes blank, no heating cycle initiates, and no error codes appear because the control board itself has lost power.

• Specs: 40VA rated | Primary: 120V AC | Secondary: 24V AC | Class 2 output | Compact chassis-mount design | OEM part number HT01BC116
• OEM vs Generic: This factory OEM transformer is wound to exact VA and voltage tolerances required by the GB1AAV036065AEJA control board. Undersized or off-tolerance generic transformers can sag under load, causing intermittent lockouts, nuisance trips, and premature control board failure.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wiring before disconnecting. Reconnect primary (120V) leads first, then secondary (24V) terminals.
• Warranty: 1-year OEM factory warranty. In-stock units ship same business day from our warehouse when ordered before 3PM local time.

Compatibility: Engineered specifically for the Carrier GB1AAV036065AEJA gas furnace. Always verify the existing transformer's VA rating and primary/secondary voltage on the unit data plate or existing component label before ordering. If you have questions about fitment, our HVAC parts specialists confirm compatibility before your order ships — no guesswork required.