OEM Carrier Control Transformer 40VA 208/230V to 24V for Model PF4MNA037T00AAAA

This OEM Carrier transformer (part # HT01CN241) is the factory-specified 40VA step-down transformer for the Carrier PF4MNA037T00AAAA fan coil / air handler unit. The transformer steps down the 208/230V line voltage to a safe 24V signal used by thermostats, control boards, contactors, and zone valves throughout the low-voltage control circuit. When this component fails, nothing in the system responds — the thermostat goes blank, the air handler won't start, and no error codes appear because the control board itself has lost power. Replacing the transformer is almost always a quick fix that restores full system operation.

• Specs: 208/230V primary | 24V secondary | 40VA power rating | Direct OEM fit for Carrier PF4MNA037T00AAAA
• OEM vs Generic: This is a genuine Carrier Factory Authorized Part built to exact voltage and VA tolerances. Off-brand transformers can run over-VA or under-regulate output voltage, causing nuisance tripping of control boards and premature component failure.
• Install difficulty: 2/5 — Shut off the disconnect and verify zero voltage before touching any wiring. Tools needed: multimeter, flat-head and Phillips screwdrivers, wire nuts or spade connectors. Photograph all wiring before removal. Replace like-for-like on primary and secondary terminals.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered by 3 PM local time.

Compatibility: Designed for the Carrier PF4MNA037T00AAAA fan coil/air handler. Cross-references to ICP, Heil, and Tempstar systems sharing the HT01CN241 specification. Always verify your unit's data plate voltage and VA rating before ordering. Our fitment team is standing by to confirm compatibility — contact us before you order if you have any questions.