OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG9MAB048100ABSA

This OEM control-circuit transformer is the factory-specified replacement for the Carrier PG9MAB048100ABSA gas furnace. It steps down 120V line voltage to the 24V AC signal that powers every low-voltage component in your system — thermostat, gas valve, inducer relay, and control board. When this transformer fails, the furnace goes completely silent: no call-for-heat response, no inducer start, no status codes on the board. A quick voltage check between the R and C terminals (should read ~24V AC) will confirm a failed transformer before ordering.

• Specs: 120V primary | 24V secondary | 40VA rated | Wire-lead connections | Foot-mount configuration | 60 Hz | Includes 3A fuse protection
• OEM vs Generic: OEM units are wound to exact VA tolerance, ensuring stable 24V output under full load. Generic transformers often sag under simultaneous thermostat + gas valve + board draw, causing erratic lockouts and nuisance no-heat calls.
• Install difficulty: 2/5 — Shut off power at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before removal. Note superseding OEM part number HT680054 ships in a Carrier factory-authorized parts box and is a direct drop-in replacement.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse.

Compatibility: Verified fit for Carrier model PG9MAB048100ABSA gas furnace. OEM part number HT01BC116 has been updated to HT680054 — both are fully interchangeable and covered by this listing. Confirm input voltage (120V) on your unit's data plate before ordering. Questions about fitment? Our HVAC parts specialists verify compatibility before every order — call or chat today and ship it out the same business day.