OEM Carrier Furnace Transformer 40VA 120V–24V for Model PG9MAB036060ABSA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG9MAB036060ABSA gas furnace. It converts 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 the transformer fails, nothing responds: no heat call, no blower command, and no error code — because the entire control circuit goes dark. If you measure 0V between the R and C terminals on your control board, a failed transformer is the first suspect.

• Specs: 40VA rating | 120V primary | 24V secondary | 60 Hz | Single-phase | Foot-mount configuration | Wire-lead connections with insulated female quick-connects
• OEM vs Generic: This OEM unit is wound to factory-exact VA and voltage tolerances. Undersized or off-spec generic transformers can overheat under simultaneous thermostat + zone valve loads, tripping the internal thermal cutout and causing intermittent no-heat calls.
• Install difficulty: 2/5 — Turn off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wire connections before removal. Discharge any residual voltage and confirm 0V before touching leads.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility & Part Note: OEM part number HT01BC116 has been superseded by HT680054 — the current factory-authorized replacement shipped in a Carrier/Bryant factory box. This listing covers both numbers; you will receive the current production HT680054 unit, which is a direct drop-in replacement. Fits Carrier PG9MAB036060ABSA and other Carrier, Bryant, and Payne furnaces specifying a 40VA 120V/24V transformer. Verify your existing transformer's VA rating and voltage on the unit data plate before ordering. Need fitment confirmation? Our team checks compatibility before you buy.