OEM Carrier Control Transformer 40VA for Model HP13NR04800GAKAA

This is the factory-original OEM replacement transformer (part# HT01AW229) for the Carrier HP13NR04800GAKAA heat pump system. The control transformer steps down 120V line voltage to the 24V signal voltage required by your thermostat, contactor coil, and all low-voltage control circuitry. When it fails, the entire control circuit goes dark — your thermostat goes blank, the system stops responding to calls for heating or cooling, and no components receive a start signal. A failed transformer is often misdiagnosed as a thermostat or control board issue, making it a critical first diagnostic check.

• Specs: 40VA rating | 120V primary / 24V secondary | Class 2 transformer | OEM part number HT01AW229 | Factory-matched to Carrier HP13NR04800GAKAA control circuit requirements
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances for your system. Undersized or off-spec aftermarket units can overheat under full load, trip internal fuses prematurely, or deliver unstable 24V that confuses control boards and thermostats.
• Install difficulty: 2/5 — Shut off power at the breaker and disconnect panel before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, needle-nose pliers. Label all low-voltage wires before disconnecting. Verify 24V output with a multimeter after installation before restoring full power.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier HP13NR04800GAKAA split-system heat pump. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or existing component label before ordering. Our parts specialists are available to confirm fitment — reach out before you order if you have any questions. Order today and receive same-day shipping on all in-stock parts.