OEM Carrier Control Transformer 60VA 115/208/230V–24V for Model PH13NA01800GABAA

This OEM control transformer (part number HT01AW229) is the factory-specified replacement for the Carrier PH13NA01800GABAA heat pump system. The control transformer steps down line voltage (115, 208, or 230V primary) to a safe 24V AC secondary signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, and any connected control boards. When this transformer fails, the system will appear completely unresponsive: no thermostat display, no contactor pull-in, and no fan or compressor operation despite power being present at the unit.

• Specs: 60 VA power rating | 115/208/230V AC primary (multi-tap) | 24V AC secondary | 50/60 Hz | Foot-mount configuration | Factory-matched OEM tolerances
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, engineered to exact VA capacity and insulation class for the PH13NA01800GABAA. Generic transformers rated at 40VA are often substituted incorrectly and can fail under full control-circuit load, causing nuisance callbacks and potential board damage.
• Install Difficulty: 3/5 — Disconnect all power before beginning. Tools needed: multimeter (verify 24V output after install), flathead and Phillips screwdrivers, wire stripper, insulated terminals. Always verify primary tap wiring matches your supply voltage (115V, 208V, or 230V) before energizing. Mislabeled taps are a common re-install error.
• Warranty: 1-year OEM factory warranty. In-stock and ships the same business day from our warehouse.

Compatibility: Designed for the Carrier PH13NA01800GABAA heat pump. Cross-references include part number HT01AW229A. Verify your supply voltage and confirm the existing transformer's VA rating on the data plate before ordering — do not substitute a lower-VA unit. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.