OEM Carrier 40VA Control Transformer HT01CN236 for Model FA4ANF060000AFAA

This OEM control transformer (part# HT01CN236) is the factory-specified replacement for the Carrier FA4ANF060000AFAA fan coil air handler. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the entire control circuit goes dead: the thermostat goes blank, the system stops responding to calls for cooling or heating, and no components energize. A failed transformer is often misdiagnosed as a bad thermostat or control board, so always verify 24V output at the secondary terminals before replacing other components.

• Specs: 40VA rating | Primary: 120V AC | Secondary: 24V AC | Direct OEM replacement | Part number HT01CN236 | Matches factory terminal configuration for FA4ANF060000AFAA
• OEM vs Generic: OEM transformers are wound to exact VA and voltage tolerances specified by Carrier engineering. Undersized or off-spec generic transformers can sag under load, cause erratic control behavior, or trip on thermal overload — especially in multi-stage systems drawing continuous 24V demand.
• Install difficulty: 2/5 — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all low-voltage wiring before disconnecting terminals. Confirm primary and secondary wiring polarity during reinstall.
• Warranty: 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our climate-controlled warehouse.

Compatibility: Engineered specifically for the Carrier FA4ANF060000AFAA fan coil air handler. Always verify your unit's data plate voltage requirements and existing VA rating before ordering to ensure a direct match. Our HVAC parts specialists are available to confirm fitment — order with confidence and get back to comfort fast.