{"product_id":"carrier-pf4mna043000abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNA043000ABAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V–24V for Model PF4MNA043000ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PF4MNA043000ABAA\u003c\/strong\u003e 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.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA rated | OEM part number HT01CN241 | Direct factory-spec replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — 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.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock units ship same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePF4MNA043000ABAA\u003c\/strong\u003e 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.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643289522547,"sku":"CARRIE-PF4MNA043000ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643289555315,"sku":"CARRIE-PF4MNA043000ABAA-TRANSFORMER-HT01CN241-GEN","price":95.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01CN241_e5ea1fce-e77f-4183-84ef-333ba1285dcc.jpg?v=1775041574","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna043000abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}