OEM Carrier 40VA Control Transformer HT01CN236 for Model FV4ANF005000ABAA

This is the factory OEM replacement transformer (part number HT01CN236) for the Carrier FV4ANF005000ABAA fan coil air handler. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire system goes dark: the thermostat loses power, the system won't heat or cool, and no error codes can be read. It is often the first component to check when nothing responds at all.

• Specs: 40VA rated | 120V primary / 24V secondary | Class 2 transformer | Direct OEM drop-in replacement for part number HT01CN236
• OEM vs Generic: The OEM HT01CN236 transformer is wound to exact VA specifications for the FV4ANF005000ABAA control board's load requirements. Undersized or off-tolerance generic transformers can overheat, blow fuses, or damage downstream control boards — making OEM the only safe choice for this application.
• Install difficulty: 2/5 — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdriver, multimeter, wire nuts or spade connectors. Confirm 24V output with a multimeter after installation before restoring full system power.
• Warranty: 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse.

Compatibility: Designed specifically for the Carrier FV4ANF005000ABAA fan coil air handler. Always verify your existing transformer's VA rating and primary/secondary voltages on the unit data plate or old component label before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions. Order now and ship today.