OEM Carrier 40VA Control Transformer HT01CN241 for Model FB4CNP060000AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified 120V-to-24V step-down transformer for the Carrier FB4CNP060000AAAA fan coil air handler. The transformer powers the entire 24V control circuit — including the thermostat, contactor coil, and control board. When it fails, the system goes completely silent: no thermostat response, no fan operation, and no cooling or heating. A failed transformer is often misdiagnosed as a thermostat or control board fault, making it the first component to test when nothing works.

• Specs: 40VA rating | Primary voltage: 120VAC | Secondary voltage: 24VAC | OEM part number HT01CN241 | Factory-matched for Carrier FB4CNP060000AAAA air handlers
• OEM vs Generic: This OEM transformer is wound to exact factory VA and voltage specifications. Generic replacements often use lower-grade core materials, leading to voltage sag under load that causes erratic control board behavior and premature component wear.
• Install difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or push-in connectors. Verify 24VAC output after installation before restoring power to the full system. Always confirm primary wire connections match incoming voltage.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Engineered specifically for the Carrier FB4CNP060000AAAA fan coil air handler. Verify your unit's data plate shows 120V primary input before ordering. If your control circuit repeatedly blows fuses or trips the transformer, inspect for shorted thermostat wiring before installing the new unit. Order today and our HVAC parts specialists can confirm fitment before your order ships.