OEM Carrier Transformer 40VA 120V to 24V for Model FE4ANF003L00ABAA

This is the factory OEM replacement transformer (part number HT01CN236) for the Carrier FE4ANF003L00ABAA air handler. The transformer steps down line voltage from 120V to the 24V control-circuit voltage required by your thermostat, control board, and zone valves. When the transformer fails, the entire low-voltage control circuit goes dead — the thermostat goes blank, the system shows no response, and nothing turns on. A blown transformer is often caused by a wiring short in the low-voltage circuit, so always inspect thermostat wiring before replacing.

• Specs: 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01CN236 | Factory-matched electrical specifications
• OEM vs Generic: This OEM transformer is wound to Carrier's exact VA rating and insulation class, ensuring reliable 24V output under load. Generic transformers are often undersized in VA capacity, causing premature burnout when multiple control components draw simultaneously.
• Install difficulty: 2/5 — Disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Verify 24V output with a multimeter after installation before restoring full power. Check for any low-voltage wiring shorts first to prevent repeat failure.
• Warranty: 1-year OEM factory warranty. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FE4ANF003L00ABAA air handler. Verify your existing transformer's VA rating and voltage on the unit's data plate or wiring diagram before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you purchase — contact us anytime.