OEM Carrier 60VA Control Transformer 115/208/230V Primary 24V Secondary for Model PH10JA030000AGAA

This OEM control transformer is the factory-specified replacement part for the Carrier PH10JA030000AGAA heat pump. The transformer steps down the 115/208/230V line voltage to the 24V signal voltage that powers your thermostat, contactor coil, reversing valve, and all low-voltage control circuits. When this transformer fails, the entire control circuit goes dead — your thermostat will go blank, the system will not respond to any call for heating or cooling, and you may find a blown low-voltage fuse as a secondary symptom. Replacing this transformer is one of the most impactful single-component repairs you can perform on a non-responsive heat pump.

• Specs: 60VA power rating | Primary voltage: 115/208/230VAC (multi-tap) | Secondary voltage: 24VAC | 50/60 Hz | Foot-mount configuration | OEM Part# HT01AW229
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part engineered to exact VA and voltage tolerances. Generic transformers often run undersized VA ratings, leading to premature burnout under normal HVAC control-circuit loads.
• Install difficulty: 2/5 — Shut off all power to the unit at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install), wire nuts or spade terminals. Always label and photograph all low-voltage wiring before disconnecting. Check for a blown fuse on the secondary side before installing — if the fuse is blown, identify the short first to avoid immediately burning out the new transformer.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed and factory-matched for the Carrier PH10JA030000AGAA heat pump. Also compatible with select Bryant and Payne models using the HT01AW229 / HT01AW229A specification — verify your unit's data plate primary voltage tap requirement (115V, 208V, or 230V) before ordering. Have a question about fitment? Our HVAC parts specialists verify compatibility before you buy.