OEM Carrier 40VA Control Transformer for Model FZ4ANP036L10AAAA — Part HT01CN241

This is the OEM factory-replacement control transformer (part number HT01CN241) for the Carrier FZ4ANP036L10AAAA air handler. The transformer is the backbone of your system's low-voltage control circuit — it steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coils, and zone controls. When this component fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any calls for heating or cooling, and you may find a tripped fuse on the control board. If everything went silent at once, the transformer is the first component to suspect.

• Specs: 40VA rated | 120V primary / 24V secondary | OEM part number HT01CN241 | Factory-matched windings and insulation class for long service life
• OEM vs Generic: This is a genuine Carrier OEM transformer wound to exact VA and voltage specifications. Generic transformers often run underrated VA, causing thermal overload failures within one to two seasons — especially in systems with multiple zone valves or larger control boards drawing higher current.
• Install difficulty: 2/5 — Disconnect all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after installation. Photograph all wiring connections before removing the old unit. Primary wires carry 120V — verify power is off before touching any terminals.
• Warranty: 1-year OEM manufacturer warranty. Orders placed before cutoff ship same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier FZ4ANP036L10AAAA air handler. Verify your existing transformer's VA rating and primary/secondary voltages on the unit's data plate or wiring diagram before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you purchase — no guesswork required. Order now and receive same-day shipping on this in-stock OEM part.