OEM Carrier Furnace Control Transformer 40VA 120V/24V for Model PG9MAA036060ACKA

This OEM step-down transformer is the factory-specified replacement for the Carrier PG9MAA036060ACKA gas furnace. The transformer converts 120V line voltage down to 24V AC to power the low-voltage control circuit — including the thermostat, gas valve, inducer relay, and control board. When it fails, the furnace goes completely silent: the thermostat shows no response, the inducer never starts, and no error codes appear because the control board itself has no power. A failed transformer is one of the most common "nothing works" diagnoses in residential gas furnaces.

• Specs: 40VA capacity | 120V primary input | 24V secondary output | 60 Hz single-phase | Foot-mount bracket | Wire lead connections with insulated female quick-connects
• OEM vs Generic: This OEM unit is wound to exact Carrier factory tolerances, ensuring stable 24V output under full load. Generic transformers often deliver under-voltage at peak demand, causing erratic board behavior, nuisance lockouts, and premature control board failure.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching terminals). Photograph or label all wire connections before removing the old unit. Swap leads one at a time to avoid miswiring.
• Warranty: 1-year OEM manufacturer warranty. In-stock — ships same business day when ordered by 3 PM local time.

Compatibility: Direct OEM replacement for Carrier model PG9MAA036060ACKA gas furnace. Also replaces legacy part numbers HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, HT01AA012, HT01AQ110, HT01CT210, 322666-701, 322953-302, and B1810113. Always verify your unit's data plate voltage and VA rating before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy.