OEM Carrier Transformer 120V to 24V 40VA for Model PH13NR018000AAAA

This is the factory OEM replacement transformer (part number HT01AW229) for the Carrier PH13NR018000AAAA heat pump. The transformer steps down line voltage (120V) to the 24V low-voltage control circuit that powers your thermostat, contactor coil, and control board. When this part fails, the entire control system goes dead — the thermostat goes blank, the system won't respond to calls for heating or cooling, and no 24V devices operate at all.

• Specs: Primary voltage: 120V | Secondary voltage: 24V | VA rating: 40VA | OEM part number: HT01AW229 | Factory-matched to Carrier PH13NR018000AAAA low-voltage control circuit requirements
• OEM vs Generic: This is the genuine OEM Carrier transformer, wound and rated to exact factory specifications. Generic transformers often carry loose VA tolerances and lower-grade core materials, risking voltage sag under full control-circuit load and premature failure.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wiring connections before removal. Verify 24V output with a multimeter before reassembling the panel.
• Warranty: 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before the daily cutoff.

Compatibility: Designed specifically for the Carrier PH13NR018000AAAA heat pump. Always verify your unit's data plate voltage and VA requirements match before ordering. Our parts specialists are available to confirm fitment — contact us before you order if you have any questions. Order now and your part ships today.