OEM Carrier Furnace Transformer 40VA 120V-24V for Model PG8UAA060155AAJA

This OEM step-down transformer is the factory-authorized replacement for the Carrier PG8UAA060155AAJA gas furnace, originally sold under part number HT01BC116 and superseded by HT680054. The transformer converts 120V line voltage down to 24V AC to power every low-voltage control circuit in your furnace — including the thermostat, inducer relay, gas valve, and ignition board. When the transformer fails, the entire furnace goes dark: no thermostat response, no ignition attempt, no heat. A blown transformer is often caused by a short in the 24V wiring circuit, so always inspect secondary-side wiring before installing the new unit.

• Specs: 40VA rating | 120V primary / 24V secondary | 50/60 Hz single-phase | Wire-lead connections with insulated female quick-connects | Compact foot-mount design (3″ L × 2-3/16″ W × 2″ H)
• OEM vs Generic: This OEM transformer is wound to exact Carrier factory tolerances, ensuring stable 24V output under full VA load. Generic units often run off-voltage, causing nuisance control-board lockouts and premature contactor coil wear.
• Install difficulty: 2/5 — Shut off power at the breaker and confirm voltage is zero before disconnecting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Check secondary-side wiring for shorts before energizing. Typical swap time: 20–30 minutes.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Designed for the Carrier PG8UAA060155AAJA gas furnace. OEM part HT01BC116 has been superseded by HT680054 — both are covered by this listing. Also replaces HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, HT01AA012, HT01AQ110, HT01CT210, 322666-701, and B1810113. Verify primary voltage (120V) on your unit's data plate before ordering. Need help confirming fitment? Our HVAC parts specialists are standing by — order with confidence and get back to heat fast.