OEM Carrier Control Transformer 60VA 115/208/230V–24V for Model PH12NA036000AAAA

This is the genuine OEM control transformer for the Carrier PH12NA036000AAAA packaged heat pump unit. The transformer steps down high-voltage primary power (115, 208, or 230 VAC) to the 24 VAC required by the low-voltage control circuit — powering the thermostat, contactor coil, and all safety controls. When this part fails, the entire control circuit goes dead: the thermostat loses power, the system won't respond to any call for heating or cooling, and nothing operates. A failed transformer may also blow the low-voltage fuse or trip a breaker on the control board.

• Specs: 60 VA power rating | Primary voltage: 115 / 208 / 230 VAC | Secondary voltage: 24 VAC | 50/60 Hz | Foot-mounted configuration | OEM Part Number: HT01AW229
• OEM vs Generic: This factory-authorized Carrier transformer is wound to exact VA and voltage tolerances, ensuring reliable 24V output under full control-circuit load. Generic alternatives often run outside tolerance, causing intermittent lockouts, nuisance fuse failures, and shortened control board life.
• Install difficulty: 3/5 — Disconnect and lock out all power before beginning. Tools needed: multimeter, flathead and Phillips screwdrivers, needle-nose pliers, wire stripper. Label all low-voltage wiring before disconnecting. Verify 24 VAC output after installation before closing the unit.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before the cutoff.

Compatibility: Designed as the direct factory replacement for Carrier model PH12NA036000AAAA. Cross-references include HT01AW229A. Always verify your unit's data plate primary voltage (115V, 208V, or 230V) before ordering — this transformer supports all three. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy. Order now — in stock and ships today.