OEM Carrier Transformer 40VA 120V/24V for Model FX4ANB060000ABAA

This OEM replacement transformer (part number HT01CN236) is the factory-specified control circuit transformer for the Carrier FX4ANB060000ABAA air handler. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, and all low-voltage relay circuits. When this component fails, the entire control system goes dark — the thermostat loses power, contactors won't energize, and neither heating nor cooling can be called. A failed transformer is often misdiagnosed as a bad control board, making this an essential first diagnostic check.

• Specs: 40VA rated | 120V primary / 24V secondary | Class 2 control circuit transformer | Factory-matched OEM part number HT01CN236 | Includes built-in circuit breaker protection on most units
• OEM vs Generic: This OEM unit is wound to Carrier's exact VA rating and insulation class, ensuring stable 24V output under full control load. Generic transformers frequently underperform at rated VA, causing intermittent lockouts and nuisance tripping of low-voltage fuses.
• Install Difficulty: 2/5 — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 0V before touching wiring). Label or photograph low-voltage wiring connections at the secondary terminals prior to removal. Total time: approximately 20–30 minutes for a qualified technician.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before cutoff ship the same business day from our stocked warehouse.

Compatibility: Engineered specifically for the Carrier FX4ANB060000ABAA fan coil air handler. Always verify the VA rating and primary/secondary voltages on your unit's wiring diagram or data plate before ordering to confirm fitment. Our HVAC parts specialists are available to confirm compatibility before you buy — no guesswork, no return hassle. Order today and get same-day shipping on in-stock OEM parts.