OEM Carrier Furnace Control Transformer 120V–24V 40VA for Model PG8UAA060155ACJA

This OEM step-down transformer (part number HT01BC116, superseded by HT680054) is the factory-specified low-voltage transformer for the Carrier PG8UAA060155ACJA gas furnace. It converts 120V line voltage down to 24V AC to power every low-voltage control component in the furnace — the thermostat circuit, control board, gas valve coil, and any connected accessories. When the transformer fails, you'll typically see a completely dead control board, a thermostat with no display, or a furnace that will not respond to any call for heat. A blown fuse or short in the secondary circuit is the most common cause of transformer burnout.

• Specs: Primary Voltage: 120V AC | Secondary Voltage: 24V AC | VA Rating: 40VA | Frequency: 50/60 Hz | Phase: Single | Mounting: Foot-mount with wire leads
• OEM vs Generic: This OEM transformer is wound to exact Carrier factory specifications for secondary voltage stability under full load. Generic units frequently sag below 24V at peak draw, causing intermittent lockouts and control board faults that are difficult to diagnose.
• Install Difficulty: 2/5 — Turn off power at the breaker and confirm voltage is zero before touching any wiring. Tools needed: flathead and Phillips screwdriver, multimeter, needle-nose pliers. Photograph all wiring connections before disconnecting. Check for a secondary-side short before installing the new transformer to avoid repeat failure.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Direct OEM replacement for Carrier model PG8UAA060155ACJA gas furnaces. Also cross-references HT680054, HT01BC115, HT01BB126, HT01CT120, and HT01BC120. Verify primary voltage (120V) on your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.