OEM Carrier 60VA Control Transformer HT01AW229 for Model PH12NA04800GAGAA

This is the factory-authorized OEM replacement control transformer for the Carrier PH12NA04800GAGAA packaged heat pump unit. The transformer steps down the high-voltage supply (115/208/230V primary) to the 24V secondary signal used to power the thermostat, control board, and all low-voltage relay circuits throughout the unit. When this transformer fails, the entire control circuit goes dead — the thermostat loses power, the unit won't respond to any call for heating or cooling, and no error codes are generated because the board itself has no power. Replacing this transformer is one of the most impactful single-component repairs you can make on this unit.

• Specs: 60 VA rating | Primary voltage: 115 / 208 / 230 VAC | Secondary voltage: 24 VAC | Foot-mount configuration | OEM part number: HT01AW229
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part. OEM transformers are wound to exact VA and voltage tolerances required by the PH12NA04800GAGAA control board. Generic alternatives often run at looser tolerances, risking under-voltage conditions that cause nuisance lockouts or premature board failure.
• Install difficulty: 2/5 — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wiring before disconnecting. Foot-mount design allows direct bolt-in replacement on the PH12NA04800GAGAA chassis.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement transformer for the Carrier PH12NA04800GAGAA packaged heat pump. Verify your unit's data plate voltage matches the 115/208/230V primary specification before ordering. Have a question about fitment? Our HVAC parts specialists confirm compatibility before you buy — order with confidence and get it shipped today.