OEM Carrier 40VA Control Transformer for Model HUMCCLBP2217A — Part P201-2201

This OEM replacement transformer (part number P201-2201) is the factory-specified 40VA step-down transformer for the Carrier HUMCCLBP2217A whole-home bypass humidifier. The transformer converts 120V line voltage to the 24V signal required to power the humidifier's control circuit and solenoid valve. When this component fails, the entire control circuit goes dead — the unit will not respond to the humidistat, no water will flow, and no indicator lights will illuminate. It is often misdiagnosed as a control board failure, so always test the transformer first with a multimeter before replacing more expensive components.

• Specs: 40VA rating | Input: 120V AC | Output: 24V AC | OEM part number P201-2201 | Factory-matched impedance and VA capacity for reliable low-voltage signal delivery
• OEM vs Generic: This OEM Carrier transformer is wound to exact factory specifications, ensuring correct VA output and proper protection against overload. Generic transformers rated at nominal 40VA often fall short under real load conditions, leading to brownouts in the control circuit and premature solenoid wear.
• Install difficulty: 2/5 — Shut off power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts. Label or photograph all low-voltage wiring before disconnecting. Swap wire-for-wire and restore power to verify 24V output before closing the cabinet.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our NationalHVACParts.com warehouse.

Compatibility: Designed specifically for the Carrier HUMCCLBP2217A bypass humidifier. Verify that your unit's data plate references OEM part number P201-2201 or a 120V/24V 40VA transformer specification before ordering. Not sure about fitment? Our parts specialists verify compatibility before every order — reach out and we'll confirm your part before it ships.