{"product_id":"carrier-pf4mna025t00abaa-transformer-h3hwwy","title":"OEM Carrier Control Transformer 40VA 208\/230V–24V for PF4MNA025T00ABAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V–24V for Model PF4MNA025T00ABAA\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control transformer for the \u003cstrong\u003eCarrier PF4MNA025T00ABAA\u003c\/strong\u003e air handler. Part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e steps down 208\/230V line voltage to the 24V AC signal that powers the control board, thermostat circuit, and all low-voltage switching functions throughout the system. When this transformer fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system will not call for heating or cooling, and no safety outputs will energize. A failed transformer is often misdiagnosed as a bad control board, making correct identification critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA Rating | Direct OEM replacement for Carrier part HT01CN241 | Class 2 control transformer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for your specific system. Undersized or off-spec generic units can cause nuisance tripping, blown fuses, or premature control board failure due to voltage sag under load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Turn off all power before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all wire connections before disconnecting. Confirm secondary output reads ~24V AC 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 and ships same business day from our warehouse when ordered by 5 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as the factory-matched replacement for Carrier model \u003cstrong\u003ePF4MNA025T00ABAA\u003c\/strong\u003e. Always verify the transformer VA rating and primary voltage on your unit's data plate before ordering to ensure exact fitment. Have a question about compatibility? Our HVAC parts specialists confirm fitment before you buy — reach out today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643310428531,"sku":"CARRIE-PF4MNA025T00ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643310461299,"sku":"CARRIE-PF4MNA025T00ABAA-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_2c339fea-b3e1-4c0c-a5d7-ab1d9d8d0c5d.jpg?v=1775025479","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna025t00abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}