OEM Carrier 40VA Control Transformer for Model FZ4ANP048L00AAAA

This OEM replacement transformer (part number HT01CN241) is the factory-specified step-down transformer for the Carrier FZ4ANP048L00AAAA air handler. The transformer converts 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage control circuit components. When the transformer fails, the entire control circuit goes dead — your thermostat display may go blank, the system will not respond to any commands, and in some cases the secondary fuse will blow repeatedly if a wiring fault exists downstream.

• Specs: Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01CN241 | Direct factory replacement for Carrier FZ4ANP048L00AAAA air handlers
• OEM vs Generic: This is a genuine OEM Carrier transformer wound to exact factory VA and voltage specifications. Generic transformers frequently run under-rated VA, causing thermal overload, nuisance trips, and premature failure — especially in multi-stage systems drawing higher control current.
• Install difficulty: 2/5 — Always shut off power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Test secondary output (should read 24–28V AC) before closing the unit. Check for downstream short circuits if the original transformer failed due to a blown fuse.
• Warranty: 1-year OEM factory warranty. In-stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FZ4ANP048L00AAAA 4-ton air handler. Always confirm line voltage and VA requirements on your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to verify compatibility before your order ships — same-day shipping on all in-stock orders placed before 3PM local time.