OEM Carrier Control Transformer 40VA 120V/24V for Model PH13PR04800GAAAA

This OEM control transformer (part number HT01AW229) is the factory-specified replacement for the Carrier PH13PR04800GAAAA heat pump system. The transformer steps down line voltage (120V primary) to the 24V secondary signal used by your thermostat, control board, contactor coils, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any call for heating or cooling, and you may find a blown fuse on the control board.

• Specs: 40VA rating | 120V primary / 24V secondary | Direct OEM replacement for Carrier part HT01AW229 | Factory-matched output tolerance for stable low-voltage control
• OEM vs Generic: OEM transformers are wound to Carrier's exact VA and voltage specifications, ensuring your control board and thermostat receive a clean, stable 24V signal. Generic units may run off-voltage under load, causing intermittent lockouts or nuisance tripped fuses.
• Install difficulty: 2/5 — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire nuts or terminal connectors, multimeter to verify output voltage after install. Always label or photograph wiring before disconnecting leads.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier PH13PR04800GAAAA heat pump. Verify your unit's existing transformer VA rating and primary/secondary voltages on the data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy — no guesswork required.