OEM Carrier Control Transformer 40VA 120V–24V for Model U19X175U60A

This OEM control transformer (part number HT01CN001) is the factory-specified replacement for the Carrier U19X175U60A. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage control circuitry. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no safety or diagnostic functions operate.

• Specs: 120V primary | 24V secondary | 40VA rated | Factory-matched OEM tolerances | Compact foot-mount design for direct drop-in replacement
• OEM vs Generic: This OEM unit is wound and insulated to exact Carrier factory specifications. Generic transformers frequently underperform at rated VA load, causing voltage sag that triggers nuisance lockouts or damages connected control boards over time.
• Install difficulty: 2/5 — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (verify 24V output after install), wire nuts or spade connectors. Always verify the cause of failure — a shorted secondary load can blow a replacement transformer immediately if not corrected first.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed for the Carrier U19X175U60A. Verify your existing transformer's primary voltage (120V), secondary voltage (24V), and VA rating on the unit data plate or wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy.