OEM Carrier Furnace Transformer 40VA 120V–24V for Model PG8UAA060135ACJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8UAA060135ACJA gas furnace. The transformer steps 120V line voltage down to 24V to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, nothing works: the furnace will not respond to thermostat calls, the control board goes dark, and no error codes are displayed because the system has no power. A failed transformer is often misdiagnosed as a bad control board, making this a critical first diagnostic check.

• Specs: 40VA rating | Primary: 120VAC | Secondary: 24VAC | 50/60 Hz single-phase | OEM Part # HT01BC116 (superseded by HT680054) | Dimensions approx. 3″ L × 2-3/16″ W × 2″ H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 load. Generic transformers often under-deliver VA capacity, causing voltage sag that triggers nuisance lockouts or premature control board failure.
• Install Difficulty: 2/5 — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all wire connections before removal. Verify 24V output at secondary terminals before closing the cabinet.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Designed for the Carrier PG8UAA060135ACJA 80% AFUE packaged gas furnace. OEM part number HT01BC116 has been superseded by HT680054 — both references are fulfilled with the current production part. Always confirm primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. Have a fitment question? Our HVAC parts specialists verify compatibility before you buy — reach out before placing your order.