OEM Carrier 60VA Control Transformer HT01AW229 for Model PH10JA018000ABAA

This is the OEM factory-specified control transformer for the Carrier PH10JA018000ABAA packaged heat pump unit. The control transformer steps down the high-voltage supply (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 control board. When this transformer fails, the entire unit goes silent: no thermostat response, no staging, no call for heat or cool. In multi-stage systems like the PH10JA018000ABAA, a failed or undersized transformer is often misdiagnosed as a board or thermostat fault, making it critical to verify transformer output voltage first during any no-power diagnostic.

• Specs: 60 VA power rating | Primary: 115/208/230 VAC (multi-tap) | Secondary: 24 VAC | 50/60 Hz | Foot-mount configuration | OEM part number HT01AW229 (supersedes HT01AW229A)
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP). OEM transformers are wound to exact VA and voltage tolerances for the PH10JA018000ABAA's control load. Generic units frequently undersupply VA under full load, causing nuisance board resets and premature contactor coil burnout.
• Install difficulty: 3/5 — Shut off all power at the disconnect and verify zero voltage with a multimeter before touching any wiring. Note primary tap selection (115V vs 208/230V) and match to your supply voltage before energizing. Tools needed: multimeter, flathead and Phillips screwdrivers, wire stripper, needle-nose pliers. Photograph all wiring before disconnecting terminals.
• Warranty: 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered before 3 PM local time.

Compatibility: Direct OEM replacement for Carrier PH10JA018000ABAA packaged heat pump units. Also fits select Bryant and Payne equipment using the same 60VA 115/208/230V–24V transformer specification — verify your unit's data plate and existing transformer label before ordering. Questions about fitment? Our HVAC parts team confirms compatibility before you buy — call or chat today.