OEM Carrier 40VA Control Transformer for Model FB4CNP024T00AAAA Air Handler

This OEM control transformer (part# HT01CN241) is the factory-specified replacement for the Carrier FB4CNP024T00AAAA fan coil air handler. The transformer steps down 120V line voltage to 24V AC, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the result is total loss of control power: your thermostat goes blank, the system won't respond to any commands, and no heating or cooling occurs. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect the 24V circuit before installing the replacement.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM Part Number: HT01CN241 | Factory-matched output for Carrier low-voltage control circuits
• OEM vs Generic: This OEM transformer meets Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can overheat, blow the secondary fuse repeatedly, or deliver unstable voltage that causes nuisance lockouts on the control board.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Verify incoming 120V and outgoing 24V with a multimeter after installation before restoring full system power.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.

Compatibility: Designed specifically for the Carrier FB4CNP024T00AAAA fan coil air handler. Always confirm OEM part number HT01CN241 and verify 120V primary / 24V secondary 40VA rating against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility prior to purchase — orders placed before 3 PM ship the same business day.