OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG8UAA036065AAJA

This OEM step-down transformer is the factory-specified control circuit component for the Carrier PG8UAA036065AAJA gas furnace. It converts 120V line voltage to the 24V AC signal that powers your thermostat, gas valve, inducer relay, and all low-voltage control board functions. When this transformer fails, the entire control circuit goes dead — your furnace will not respond to the thermostat, the inducer won't energize, and no ignition sequence will begin. If you're measuring 0V between the R and C terminals on your control board, a failed transformer is the likely culprit.

• Specs: Input 120V AC | Output 24V AC | 40VA rating | 60Hz | Foot-mount configuration | Wire lead connections — factory-matched to OEM specification
• OEM vs Generic: This is a genuine OEM-grade replacement (superseded part HT680054) that ships in a Carrier/Bryant factory-authorized parts box. Generic transformers frequently have mismatched mounting footprints and inconsistent VA output, risking premature control board failure.
• Install Difficulty: 2/5 — Shut off power at the breaker and confirm with a non-contact voltage tester before touching any wiring. Tools needed: flathead and Phillips screwdriver, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting leads.
• Warranty: 1-year OEM manufacturer warranty. Orders placed before cutoff ship same business day from our warehouse.

Compatibility: Fits Carrier model PG8UAA036065AAJA gas furnace. Note: OEM part number HT01BC116 has been superseded by HT680054 — both are the same 120V–24V 40VA transformer and are fully interchangeable. Verify your existing transformer's input/output voltage and VA rating on the data plate before ordering. Need fitment confirmation? Our HVAC parts team is ready to verify compatibility before you buy.