OEM Carrier Transformer 40VA 120V to 24V for Model HC1AJX036000AAAA

This OEM replacement transformer (part number HT01AW229) is the factory-specified control circuit transformer for the Carrier HC1AJX036000AAAA air handler. The transformer steps down line voltage from 120V to the 24V AC signal required to power the thermostat, control board, and all low-voltage control components. When the transformer fails, the entire control circuit goes dead — your thermostat display may go blank, the system won't respond to calls for heating or cooling, and no fault codes will appear because the board itself has no power.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | Factory OEM part number HT01AW229 | Includes integral circuit breaker protection on most configurations
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or off-tolerance generic transformers can cause nuisance tripping, board brownouts, and premature contactor coil failure — choose OEM for reliable long-term performance.
• 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 confirm 24V output after install). Always label or photograph low-voltage wiring before disconnecting terminals.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier HC1AJX036000AAAA air handler. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get back to comfort fast.