OEM Carrier Control Transformer 120V–24V 40VA for Model PG9MAA024060AAKA

This OEM control transformer is the factory-specified replacement for the Carrier PG9MAA024060AAKA gas furnace. The transformer steps down 120V line voltage to 24V AC, powering the furnace's entire control circuit — including the thermostat, gas valve, inducer relay, and ignition sequence. When this transformer fails, the furnace goes completely unresponsive: no status lights, no thermostat response, no ignition attempt of any kind. It is one of the most commonly overlooked parts during a no-heat diagnostic.

• Specs: Primary Voltage: 120 VAC | Secondary Voltage: 24 VAC | Rating: 40VA | Frequency: 50/60 Hz | Phase: Single | Dimensions: 3″ L × 2-2/16″ W × 2″ H
• OEM vs Generic: This is a genuine OEM Carrier replacement, matched to factory VA rating and mounting footprint. Generic transformers frequently ship at lower VA ratings or mismatched lead lengths, causing control circuit instability or premature failure.
• Install Difficulty: 2/5 — Shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Photograph or label all low-voltage wiring before disconnecting. Note: OEM part HT01BC116 has been superseded; current shipping part is HT680054, a direct drop-in replacement.
• Warranty: 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.

Compatibility: Designed for Carrier model PG9MAA024060AAKA gas furnace. Also cross-references superseded part numbers HT01BC116, HT01BC115, HT01BB126, HT01CT120, HT01BC120, HT01AW115, HT01AA012, and HT01AQ110. Verify primary voltage (120V) and VA rating (40VA) on your unit's data plate before ordering. Our team is available to confirm fitment prior to purchase.