OEM Carrier Furnace Control Transformer 120V/24V 40VA for Model PG9YAA036060ACSS

This OEM control transformer is the factory-specified replacement for the Carrier PG9YAA036060ACSS gas furnace. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and every other low-voltage control circuit in the system. When it fails, the entire control system goes dark — no thermostat response, no ignition sequence, and no heat. A failed transformer is one of the most commonly misdiagnosed furnace faults; always verify 24V output at the secondary terminals with a multimeter before condemning the control board.

• Specs: 120V primary / 24V secondary | 40VA rated | Foot-mount chassis | OEM part number HT01BC117 (supersedes HT01BC117A) | Cross-references: Basler Electric BE161840GDD
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part wound to exact VA and voltage tolerances. Off-brand transformers are often rated at marginal 40VA, causing thermal shutdowns under full control-circuit load and nuisance lockouts.
• Install difficulty: 2/5 — Shut off all power and verify zero voltage before proceeding. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Reconnect secondary (24V) leads first, then primary (120V) leads last.
• Warranty: 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered for the Carrier PG9YAA036060ACSS packaged gas furnace. Also fits select PG9YAA, PG9YAB, PG9MTAV, and 58HDV/58HDX series models — verify your unit's data plate and existing transformer rating (120V primary / 24V / 40VA) before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — reach out before placing your order.