OEM Carrier Transformer 40VA 120V/24V for Model FE4ANB005000ABAA

This is the OEM replacement transformer (part number HT01CN236) for the Carrier FE4ANB005000ABAA air handler. The transformer steps down line voltage from 120V to the 24V AC signal required to power your thermostat, control board, and all low-voltage control circuits. When the transformer fails, the entire control circuit goes dead — your thermostat displays nothing, the system won't respond to calls for heating or cooling, and no error codes are generated because the board itself has no power.

• Specs: 40VA rated | Primary: 120V | Secondary: 24V AC | OEM part number HT01CN236 | Factory-matched for Carrier FE4ANB005000ABAA air handlers
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances specified by Carrier engineering. Generic units with loose VA ratings can under-power the control board under load, causing intermittent lockouts and nuisance tripping of the built-in thermal fuse.
• Install difficulty: 2/5 — Shut off power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire nuts or quick-connect terminals, multimeter. Label all low-voltage wires before disconnecting. Most techs complete the swap in under 20 minutes.
• Warranty: 1-year OEM factory warranty against defects. Orders placed by 3 PM local time ship same business day from our climate-controlled warehouse.

Compatibility: Designed specifically for the Carrier FE4ANB005000ABAA fan coil air handler. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or the old transformer's label before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before your order ships — no guesswork required.