OEM Carrier Control Transformer 60VA 115/208/230V–24V for Model PH12NA018000ADAA

This OEM control transformer (part number HT01AW229) is the factory-specified replacement for the Carrier PH12NA018000ADAA. The transformer steps down the line-voltage primary (115V, 208V, or 230V) to a 24V AC secondary signal that powers the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire control circuit goes dead: the thermostat displays nothing, the system won't respond to any command, and you may detect a burnt smell or see a tripped fuse on the board.

• Specs: 60VA rating | 115/208/230V primary | 24V secondary | Multi-tap primary for flexible installation | OEM part number HT01AW229 (also cross-references HT01AW229A)
• OEM vs Generic: This is the factory-authorized OEM part, manufactured to exact Carrier specifications. Generic transformers often carry lower VA ratings or looser voltage tolerances, risking nuisance fuse trips and premature failure of downstream control components.
• Install difficulty: 3/5 — Line-voltage wiring is present; always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify primary tap wiring matches your supply voltage before energizing. Check and replace the 3A or 5A control-circuit fuse if it has blown.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH12NA018000ADAA. Cross-references include HT01AW229A, CIN-TRAN, and 30-BV2006. Always verify the VA rating and primary/secondary voltages on your unit's data plate before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions.