OEM Carrier 60VA Control Transformer HT01AW229 for Model PH12NA02400GABAA

This OEM control transformer is the factory-specified replacement for the Carrier PH12NA02400GABAA packaged heat pump unit. The transformer steps down high-voltage primary power (115/208/230V) to the 24V AC signal that powers the entire control circuit — including the thermostat, contactor coil, reversing valve, and all safety switches. When this transformer fails, the result is a completely unresponsive system: no thermostat communication, no staging, no operation whatsoever. A dead 24V circuit almost always points to a failed transformer or a downstream short that has blown its internal fuse.

• Specs: 60 VA power rating | 115/208/230 VAC primary voltage | 24 VAC secondary voltage | 50/60 Hz | Foot-mount configuration | OEM part number HT01AW229 / HT01AW229A
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part. OEM transformers are wound and insulated to exact VA and impedance tolerances for the PH12NA02400GABAA. Generic substitutes frequently run under-rated VA, causing voltage sag under load and premature secondary-winding failure.
• Install difficulty: 3/5 — Disconnect power at the disconnect box and verify zero voltage with a multimeter before proceeding. Tools needed: multimeter, flathead and Phillips screwdrivers, needle-nose pliers, wire nuts or terminal connectors. Always photograph all wire terminations before removal. Check for downstream shorts (shorted contactor coil, stuck relay) before installing the new transformer — replacing a transformer without correcting the root cause will blow the new unit immediately.
• Warranty: 1-year OEM factory warranty on parts. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Engineered and tested for the Carrier PH12NA02400GABAA packaged heat pump. Cross-references include HT01AW229A. Verify primary voltage tap (115V, 208V, or 230V) matches your unit's supply voltage before installation — this transformer supports all three via selectable primary taps. Questions about fitment? Our HVAC parts specialists confirm compatibility before you order.