OEM Carrier 40VA Control Transformer HT01CN236 for Model FA4ANC036010AGAA

This OEM replacement control transformer (part# HT01CN236) is the factory-specified unit for the Carrier FA4ANC036010AGAA fan coil air handler. The transformer steps down 120V line voltage to 24VAC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the system goes completely silent: no thermostat response, no fan, no cooling. A failed transformer is also a common cause of repeated blown 3A or 5A fuses on the control board.

• Specs: 40VA rating | Primary: 120VAC | Secondary: 24VAC | Class 2 transformer | Direct OEM replacement for part number HT01CN236
• OEM vs Generic: This OEM transformer is wound to Carrier's exact VA rating and insulation class. Undersized generic transformers can overheat under full control-circuit load, causing nuisance trips, premature failure, and potential board damage.
• Install difficulty: 2/5 — Shut off all power to the air handler before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching terminals). Label or photograph all low-voltage wiring before disconnecting. Mount transformer securely to prevent vibration fatigue on wire leads.
• Warranty: 1-year OEM factory warranty against defects. Ships same business day from our warehouse when ordered before 3PM local time.

Compatibility: Designed for the Carrier FA4ANC036010AGAA fan coil air handler. Always verify your existing transformer's VA rating, primary voltage, and secondary voltage from the unit data plate or wiring diagram before ordering to confirm fitment. Our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork required.