OEM Carrier Furnace Transformer 120V–24V 40VA for Model PG9MAB060120LBSA

This OEM step-down control transformer is the factory-specified replacement for the Carrier PG9MAB060120LBSA gas furnace. It converts 120V line voltage down to 24V AC to power the low-voltage control circuit — including the thermostat, control board, gas valve, and all 24V accessories. When this transformer fails, the entire control circuit goes dead: the thermostat shows a blank screen, the furnace won't respond to any call for heat, and no fault codes will appear on the board. This part is also sold under updated OEM part number HT680054, the current factory-authorized successor to HT01BC116.

• Specs: Primary voltage: 120V AC | Secondary voltage: 24V AC | VA Rating: 40VA | Frequency: 60 Hz | Mounting: Foot-mount | Connection: Wire leads with insulated connectors
• OEM vs Generic: OEM transformers are wound to exact factory VA and voltage tolerances, ensuring stable 24V output under full load. Generic units can sag under load, causing nuisance lockouts, erratic thermostat behavior, and premature control board failure.
• Install difficulty: 2/5 — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wiring connections before disconnecting. Verify 24V output at C and R terminals on the control board after installation to confirm correct operation.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility: Direct OEM replacement for Carrier model PG9MAB060120LBSA gas furnace. Also cross-references HT01BC116B, HT01BC115, HT01BB126, HT01BC120, and HT01AW115. Always verify your existing transformer's input/output voltage and VA rating against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy.