OEM Carrier Control Transformer 40VA 120V/24V for Model CH13NA04800GACBA

This OEM replacement transformer (part number HT01AW229) is the factory-specified control circuit transformer for the Carrier CH13NA04800GACBA split-system condenser. The transformer steps down line voltage (120V) to the 24V AC signal that powers your thermostat, contactor coil, and all low-voltage control circuits. When it fails, the entire control system goes dark — your thermostat will appear dead, the contactor won't pull in, and the system will not respond to any call for cooling. A failed transformer is often misdiagnosed as a bad thermostat or control board, making it one of the most important first checks during a no-response service call.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory-matched to Carrier CH13NA04800GACBA control circuit requirements | OEM Part Number: HT01AW229
• OEM vs Generic: This is a genuine OEM Carrier transformer built to exact VA and voltage tolerances. Generic transformers can run under-rated VA, causing brownouts to the control board and premature contactor coil failure — always replace with the factory-specified unit.
• Install difficulty: 2/5 — Disconnect power at the disconnect box and verify zero voltage before proceeding. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Label or photograph all wiring connections before removal. Verify 24V output on the new transformer before closing the cabinet.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier CH13NA04800GACBA 4-ton split-system condenser. Confirm your unit's control circuit requires a 40VA 120V/24V transformer by checking the data plate or existing transformer label before ordering. Our fitment team is available to verify compatibility — just reach out before you buy. Order today and receive same-day shipping on all in-stock parts.