{"product_id":"carrier-pf4mna025000abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNA025000ABAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V–24V for Model PF4MNA025000ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01CN241) is the factory-specified 24V control circuit replacement for the \u003cstrong\u003eCarrier PF4MNA025000ABAA\u003c\/strong\u003e fan coil and air handler unit. The transformer steps down the 208\/230V line voltage to the 24V signal required by your thermostat, control board, and all low-voltage switching components. When the transformer fails, the entire control circuit loses power — symptoms include a completely unresponsive thermostat, no blower operation, and system lockout with no fault codes displayed.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V primary | 24V secondary | 40VA rated | Direct OEM replacement for part #HT01CN241 | Factory-matched to Carrier PF4MNA025000ABAA specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer built to exact factory VA and voltage tolerances. Generic aftermarket transformers often run underrated VA loads, causing overheating and premature burnout — especially in multi-stage or communicating systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wiring connections before disconnecting. Verify 24V output with a multimeter after installation before restoring full power.\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 by 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePF4MNA025000ABAA\u003c\/strong\u003e fan coil\/air handler. Verify your unit's data plate shows a 208\/230V primary and 24V secondary control circuit before ordering. Our fitment team is available to confirm compatibility — contact us before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643313246579,"sku":"CARRIE-PF4MNA025000ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643313279347,"sku":"CARRIE-PF4MNA025000ABAA-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_8abc73c2-e6d6-4d70-9e0a-abe0a141d9ed.jpg?v=1775041558","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna025000abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}