OEM Carrier 120V-24V 40VA Transformer HT01BC116 for Model PG9MAA024060ABKA

This OEM step-down control transformer is the factory-specified replacement for the Carrier PG9MAA024060ABKA gas furnace. It converts 120V line voltage to the 24V AC signal that powers every low-voltage component in the system — including the thermostat, gas valve, inducer relay, and control board. When the transformer fails, the result is unmistakable: the thermostat goes completely dark, the furnace does not respond to any call for heat or cooling, and no low-voltage components function at all. A failed transformer is often caused by a short in the secondary low-voltage circuit, so always inspect wiring and fuses before installing a replacement.

• Specs: 120V primary input | 24V AC secondary output | 40VA rating | Foot-mount configuration | Wire-lead connection type | 60 Hz
• OEM vs Generic: This OEM unit is wound to exact factory VA and voltage tolerances. Undersized or off-tolerance generic transformers can overheat, trip thermal cutoffs, and leave low-voltage components voltage-starved — shortening the life of your control board and gas valve.
• Install difficulty: 2/5 — Turn off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before disconnecting. Check secondary circuit for shorts before energizing the new transformer.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.

Compatibility note: Fits Carrier model PG9MAA024060ABKA gas furnace. OEM part number HT01BC116 has been superseded by HT680054 — both numbers are covered by this listing, and the replacement is a direct drop-in with no modification required. Verify your existing transformer's primary voltage, secondary voltage, and VA rating on the data plate before ordering. Have questions about fitment? Our team verifies compatibility before you buy — reach out and we'll confirm the correct part for your unit. In stock — order now and ships today.