OEM Carrier Control Transformer 40VA 120V-24V for Model PG9MAA060120ABKA

This OEM control transformer is the factory-specified replacement for the Carrier PG9MAA060120ABKA gas furnace, superseding original part number HT01BC116. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, gas valve, inducer, and control board. When this part fails, the furnace loses all 24V control signal, resulting in a completely dead thermostat, no-heat calls, or a furnace that refuses to start regardless of thermostat input. This is often one of the first components to check during a no-heat diagnostic.

• Specs: 40VA capacity | 120V primary / 24V secondary | 50/60 Hz single phase | Compact form factor: 3" L × 2-3/16" W × 2" H | Wire lead connections
• OEM vs Generic: This OEM unit meets Carrier's exact VA rating and insulation class tolerances. Undersized or off-brand transformers can overheat under peak control-circuit load, blow the built-in fuse repeatedly, or cause erratic board behavior — costing more in callbacks than the part itself.
• Install difficulty: 2/5 — Shut off furnace power at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph existing wiring leads before disconnecting. Swap wire-for-wire and secure to original mounting bracket.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day when ordered by 5 PM local time.

Compatibility: Direct OEM replacement for Carrier model PG9MAA060120ABKA gas furnace. Supersedes discontinued part HT01BC116; current OEM equivalent is HT680054. Also cross-references HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, and HT01AA012 — confirm your original part number on the furnace data plate before ordering. Order now and our team will verify fitment before your part ships.