OEM Carrier 40VA Control Transformer 120V/24V for Furnace Model PG8JEB054070AAJA

This OEM control transformer is the factory-specified replacement for the Carrier PG8JEB054070AAJA gas furnace. The transformer steps down 120V line voltage to the 24V signal that powers the thermostat, control board, gas valve, and all low-voltage safety circuits. When it fails — due to a short, wiring fault, or age — nothing in the control circuit works: the furnace will not respond to the thermostat, will not attempt ignition, and may blow the inline fuse. OEM part number 322666-701 has been superseded by HT680054, the current factory-authorized replacement.

• Specs: 40VA rating | 120V primary | 24V secondary | 60 Hz | Single-phase | Compact 3″ × 2-2/16″ × 2″ form factor — factory fit, no modification needed
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact VA and voltage tolerances. Undersized or off-brand transformers can overheat under combined control-circuit load, tripping thermal protection and causing nuisance lockouts.
• Install Difficulty: 2/5 — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph all wiring connections before removal. Typical install time: 20–30 minutes.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG8JEB054070AAJA gas furnace. OEM part 322666-701 is factory-superseded by HT680054 — both part numbers are fulfilled with the current OEM unit. Verify your furnace's data plate shows 120V/24V control circuit before ordering. Our HVAC parts specialists are available to confirm fitment before you buy — order with confidence.