OEM Carrier 60VA Control Transformer (HT01AW229) for Model PH13NB04900GAAAA

This is the genuine OEM factory-replacement control transformer for the Carrier PH13NB04900GAAAA heat pump system. The control transformer steps down high-voltage line power (115, 208, or 230V primary) to the 24V AC signal that powers your thermostat, contactor coil, and all low-voltage control logic. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any call for heating or cooling, and you may measure 0V on the secondary terminals with line voltage confirmed at the primary. Some units will blow the low-voltage fuse repeatedly if a secondary-side short is present; always check for shorted wiring before replacing the transformer.

• Specs: 60VA power rating | Primary: 115V / 208V / 230V (multi-tap) | Secondary: 24VAC | Foot-mount configuration | 50/60 Hz | OEM Part Number: HT01AW229 / HT01AW229A
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part, wound to exact VA and voltage specifications. Off-brand transformers frequently run under-rated VA, causing premature thermal cutout trips and nuisance lockouts under full control-circuit load.
• Install difficulty: 2/5 — Disconnect power at the breaker and confirm voltage is absent before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label and photograph all wiring before removal. Check the secondary fuse and all low-voltage wiring for shorts prior to installing the new transformer.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH13NB04900GAAAA heat pump unit. Cross-references include HT01AW229A. Verify your existing transformer's primary voltage tap, VA rating, and mount style against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you buy if you have any questions.