OEM Carrier 40VA Control Transformer for Model FY4ANB060000AAAA

This OEM step-down transformer (part# HT01CN241) is the factory-specified replacement for the Carrier FY4ANB060000AAAA air handler. The transformer converts 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage control circuits. When it fails, the entire control system goes dark — the thermostat loses power, the system won't respond to any call for heating or cooling, and your unit sits completely unresponsive. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before purchasing more expensive parts.

• Specs: 40VA rating | 120V primary input | 24V secondary output | Class 2 transformer | Factory-matched to Carrier FY4ANB060000AAAA wiring harness and control board
• OEM vs Generic: OEM transformers (HT01CN241) are wound to exact VA and voltage tolerances. Undersized or off-spec generic units can overdraw current, blow low-voltage fuses repeatedly, and damage sensitive control board components over time.
• Install difficulty: 2/5 — Disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after install). Label all low-voltage wires before disconnecting. Job typically takes 20–30 minutes.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. In-stock units ship same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FY4ANB060000AAAA 5-ton air handler. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions. Order today and your part ships the same business day.