OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG9MAB060080ACSA

This OEM control transformer is the factory-specified replacement for the Carrier PG9MAB060080ACSA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the low-voltage control circuit that operates your thermostat, gas valve, inducer, and control board. When it fails, nothing works — the furnace will not respond to any thermostat call, and you may measure 0V between the R and C terminals on the control board. This is a common failure point in aging furnaces and a straightforward DIY fix.

• Specs: 120V primary input | 24V AC secondary output | 40VA rating | Foot-mount configuration | Wire lead connections | Includes 3A inline fuse protection
• OEM vs Generic: This OEM unit is factory-matched to the PG9MAB060080ACSA's control circuit load requirements. Generic transformers often lack correct VA headroom, causing overheating and premature failure — especially in systems with both a furnace and a connected AC unit sharing the same transformer.
• Install difficulty: 2/5 — Shut off power at the breaker and disconnect the furnace before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install), wire strippers if re-terminating leads. Photograph all wire connections before removal. Note: OEM part number HT01BC116 is superseded by HT680054 — both are the same factory-spec unit.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse.

Compatibility: Designed for the Carrier PG9MAB060080ACSA gas furnace. Also compatible with a wide range of Carrier, Bryant, and Payne furnaces using the 120V-24V 40VA transformer specification. Always verify your existing transformer's input voltage, output voltage, and VA rating against your unit's data plate before ordering. Our team is available to confirm fitment — contact us before you buy for peace of mind.