OEM Carrier 40VA Control Transformer HT01BC116 for Model PG9MAB048060LBSA

This OEM control transformer (part# HT01BC116) is the factory-specified replacement for the Carrier PG9MAB048060LBSA gas furnace. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer controls, and control board. When it fails, the thermostat goes completely dark, nothing responds, or the system trips a fuse repeatedly. Replacing the transformer is one of the first diagnostic steps any technician takes on a fully non-responsive furnace.

• Specs: 120V primary → 24V secondary | 40VA rating | Factory-matched terminals | Meets OEM insulation and thermal rating standards
• OEM vs Generic: This is a genuine OEM Carrier part (HT01BC116), manufactured to exact factory specifications. Generic transformers often use lower-grade core laminations and substandard wiring insulation, increasing the risk of premature failure or nuisance fuse-blowing that can damage downstream components.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage before beginning. Tools needed: flathead and Phillips screwdrivers, 1/4" nut driver, needle-nose pliers, multimeter. Label or photograph all low-voltage wiring before disconnecting. Always check and replace any blown 3A or 5A control fuses before restoring power.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for Carrier PG9MAB048060LBSA gas furnace. Verify your existing transformer's primary/secondary voltage and VA rating against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork required.