OEM Carrier Control Transformer 40VA 208/230V–24V for Model PF4MNA043000ABAA

This OEM Carrier transformer (part number HT01CN241) is the factory-specified replacement for the Carrier PF4MNA043000ABAA air handler. The transformer steps down 208/230V line voltage to the 24V AC signal that powers the entire control circuit — including the thermostat, control board, zone valves, and relays. When this part fails, the system goes completely silent: no blower response, no thermostat communication, and no heating or cooling calls answered. Replacing a failed transformer is one of the most cost-effective HVAC repairs available.

• Specs: 208/230V Primary | 24V Secondary | 40VA rated | OEM part number HT01CN241 | Direct factory-spec replacement
• OEM vs Generic: OEM transformers are wound and rated to Carrier's exact VA and voltage specifications, preventing damaging voltage sags under peak control-circuit load. Generic alternatives often fall short of 40VA true capacity, risking premature failure of downstream boards and contactors.
• Install difficulty: 2/5 — Shut off all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before disconnecting. Verify primary voltage matches your supply before powering back on.
• Warranty: 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.

Compatibility: Engineered for the Carrier PF4MNA043000ABAA air handler. Verify your existing transformer's primary voltage (208/230V), secondary voltage (24V), and VA rating (40VA) on the unit's data plate or existing transformer label before ordering. Our fitment team is available to confirm compatibility before you buy — call or chat today.