OEM Carrier Control Transformer 60VA 115/208/230V–24V for Model PH12NA048000ACAA

This is the factory-authorized OEM control transformer (part number HT01AW229) for the Carrier PH12NA048000ACAA heat pump system. The control transformer steps down line voltage (115, 208, or 230 VAC primary) to a safe 24 VAC secondary signal that powers the entire low-voltage control circuit — including the thermostat, contactor coil, reversing valve, and any connected zone controls. When this transformer fails, the result is typically a completely unresponsive system: the thermostat goes dark, no relay clicks, and no heating or cooling operation occurs. A shorted secondary load or a nearby lightning surge are the most common causes of failure.

• Specs: 60 VA power rating | 115/208/230 VAC primary (multi-tap) | 24 VAC secondary | 50/60 Hz | Foot-mount configuration | Replaces HT01AW229A and cross-references CIN-TRAN, 30-BV2006, 30-1814A
• OEM vs Generic: This OEM unit is wound to factory tolerances and rated for continuous-duty HVAC use. Generic transformers often use thinner wire gauges and lower-grade cores that overheat under sustained load, leading to premature failure and potential nuisance tripping of the secondary fuse.
• Install difficulty: 3/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: multimeter (verify 24V output after install), screwdrivers, wire stripper, and needle-nose pliers. Label all low-voltage wires before disconnecting. Check and replace the secondary 3A fuse if blown — a blown fuse often indicates a shorted load that should be found before replacing only the transformer.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PH12NA048000ACAA. The multi-tap 115/208/230V primary makes this transformer suitable across a range of Carrier, Bryant, and Payne equipment sharing this transformer specification. Always verify the VA rating, primary voltage tap, and mounting style against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy.