OEM Carrier 40VA Control Transformer HT01CN241 for Model FZ4ANP024L00AAAA

This is the factory OEM replacement transformer (part number HT01CN241) for the Carrier FZ4ANP024L00AAAA fan coil air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your control board, thermostat, and all low-voltage system components. When this transformer fails, the entire control circuit goes dark — your thermostat will display nothing, the system will not respond to any call for heating or cooling, and no safety or operating sequence will initiate. It is one of the first components to check when a unit appears completely unresponsive.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN241 | Factory-matched to Carrier FZ4ANP024L00AAAA specifications
• OEM vs Generic: This OEM transformer meets exact factory VA rating and insulation class tolerances. Undersized or off-brand transformers can sag under load, causing nuisance lockouts, control board brownouts, and premature contactor coil failure.
• Install difficulty: 2/5 — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade terminals. Confirm primary and secondary voltage with a meter before reconnecting. Label all low-voltage wiring prior to removal.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our climate-controlled warehouse.

Compatibility: Designed and tested for the Carrier FZ4ANP024L00AAAA fan coil air handler. Verify your existing transformer's VA rating and primary/secondary voltages against your unit's data plate before ordering. If your control circuit is blowing fuses repeatedly, inspect for short circuits in low-voltage wiring before replacing — a shorted thermostat wire will damage a new transformer just as quickly. Have questions about fitment? Our HVAC parts specialists confirm compatibility before you buy.