OEM Carrier Control Transformer 40VA 120V/24V for Model CH13NA03600GACBA

This is the factory OEM replacement transformer (part number HT01AW229) for the Carrier CH13NA03600GACBA split-system condenser. The control transformer steps down 120V line voltage to 24V AC, powering the low-voltage control circuit that includes your thermostat, contactor coil, and safety switches. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the contactor never energizes, and the system appears completely unresponsive even with power present at the disconnect.

• Specs: 40VA rating | 120V primary / 24V secondary | Class 2 transformer | OEM part number HT01AW229 | Factory-matched for Carrier CH13NA03600GACBA control circuit
• OEM vs Generic: OEM transformers are wound to exact VA capacity, protecting downstream control boards from voltage fluctuations. Undersized generic units can overheat under load, blow the built-in fuse repeatedly, or deliver inconsistent 24V output that causes nuisance lockouts and premature board failure.
• Install difficulty: 2/5 — Disconnect power at the breaker and outdoor disconnect before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper, and wire nuts or spade terminals. Always verify 0V at the primary leads before touching any wiring. Primary and secondary leads are typically labeled; photograph all connections before removal.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered by 3 PM local time.

Compatibility: This transformer is the factory-specified replacement for Carrier model CH13NA03600GACBA. Verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or transformer label before ordering to ensure correct fitment. If you are unsure, our HVAC parts specialists are available to confirm compatibility before you purchase — same-day shipping available on all in-stock OEM parts.