OEM Carrier 60VA Control Transformer HT01AW229 for Model PH10JA018000AGAA

This is the factory OEM control transformer (part number HT01AW229) for the Carrier PH10JA018000AGAA packaged HVAC unit. The control transformer steps down line-voltage power (115, 208, or 230V primary) to the 24V AC signal that energizes your thermostat circuit, contactor coil, gas valve, and control board. When this transformer fails, the entire low-voltage control circuit goes dead — the result is a system that simply will not respond to any thermostat call, regardless of mode. Common failure symptoms include a completely unresponsive thermostat, tripped or blown 3A control fuse, and no 24V signal measured at the secondary terminals.

• Specs: 60 VA power rating | 115/208/230V AC primary (multi-tap) | 24V AC secondary | Foot-mount configuration | 50/60 Hz compatible
• OEM vs Generic: This Factory Authorized Part is wound to exact Carrier tolerances. Aftermarket transformers frequently underperform at rated VA, causing nuisance fuse trips and premature contactor coil failures under full load.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (verify 0V before touching terminals), wire nuts or spade terminals. Label all wiring before disconnecting. Confirm multi-tap primary wiring matches your supply voltage (115V, 208V, or 230V) before energizing.
• Warranty: 1-year OEM factory warranty. In-stock unit ships same business day from our warehouse.

Compatibility: Direct factory replacement for Carrier model PH10JA018000AGAA packaged units. Also used across Bryant and Payne equipment sharing the same 60VA, 115/208/230V–24V transformer specification — verify your unit's data plate voltage and VA rating before ordering. Our parts team is available to confirm fitment before you buy.