OEM Carrier Control Transformer 60VA 115/208/230V–24V for Model PH11JA042000AAAA

This is the factory OEM control transformer for the Carrier PH11JA042000AAAA packaged heat pump unit. The transformer steps down high-voltage primary power (115, 208, or 230V AC) to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, contactors, relays, and safety switches. When this transformer fails, the system goes completely dead: the thermostat loses power, no call for heat or cooling is processed, and the unit will not start. A shorted transformer may also trip the system fuse or breaker on the low-voltage side.

• Specs: 60 VA power rating | Primary voltage: 115/208/230 VAC (multi-tap) | Secondary voltage: 24 VAC | Foot-mount configuration | 50/60 Hz | OEM Part# HT01AW229
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part (FAP). OEM transformers are wound to exact VA and voltage tolerances to protect downstream control components. Undersized or off-tolerance generic units can cause erratic thermostat behavior, nuisance tripping, or accelerated board failures.
• Install difficulty: 2/5 — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Always photograph existing wiring before disconnecting. Confirm correct primary tap connection for your supply voltage (115V, 208V, or 230V).
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.

Compatibility: Designed as the direct OEM replacement for Carrier model PH11JA042000AAAA packaged heat pump units. Cross-references include HT01AW229A. Verify your unit's supply voltage and confirm the 60VA rating on your existing transformer's data label before ordering. Our HVAC parts specialists are available to confirm fitment — just reach out before you buy.