OEM Carrier Control Transformer 40VA 120V/24V for Model CH13NA04200GAABA

This is the factory OEM replacement control transformer (part number HT01AW229) for the Carrier CH13NA04200GAABA split-system condenser. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and any connected safety devices. When this transformer fails, the entire control circuit goes dark: the thermostat displays nothing, the system ignores calls for cooling, and nothing responds. It is often the first component to check when a unit is completely unresponsive despite having line power.

• Specs: Input 120V AC | Output 24V AC | 40VA rated | OEM part number HT01AW229 | Factory-matched for Carrier CH13NA04200GAABA control circuit requirements
• OEM vs Generic: This is the genuine OEM Carrier transformer, wound and rated to exact factory specifications. Generic transformers frequently carry lower VA ratings or substandard insulation, which can cause premature failure under sustained load or nuisance tripping of secondary fusing.
• Install difficulty: 2/5 — Disconnect power at the disconnect box and confirm voltage is absent with a multimeter before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Label all wiring before disconnecting. Secondary 24V wiring is low voltage but primary 120V terminals must be treated with full caution.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier CH13NA04200GAABA condensing unit. Verify your existing transformer's input/output voltage and VA rating on the data plate or component label before ordering. If you are unsure of fitment, our HVAC parts specialists confirm compatibility before your order ships — no guesswork required.