{"product_id":"carrier-pf4mna043t00abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNA043T00ABAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V–24V for Model PF4MNA043T00ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part #HT01CN241) is the factory-specified replacement for the \u003cstrong\u003eCarrier PF4MNA043T00ABAA\u003c\/strong\u003e fan coil and air handler unit. The transformer steps down the 208\/230V line voltage to the 24V signal that powers your thermostat, control board, and all low-voltage switching circuits. When it fails, the entire control circuit goes dead — the system will not respond to the thermostat, will not stage heating or cooling, and may blow the 3A control fuse repeatedly if a secondary short is present.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA capacity | Factory-matched OEM windings and mounting footprint for direct drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM Carrier transformers are wound to exact VA and voltage-regulation tolerances. Undersized or off-spec generics can cause nuisance lockouts, low-voltage brownouts on the control board, and premature failure of downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output before closing the unit). Photograph all low-voltage wire connections before removing the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In-stock orders ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the \u003cstrong\u003eCarrier PF4MNA043T00ABAA\u003c\/strong\u003e fan coil\/air handler. Verify your unit's data plate shows a 208\/230V primary supply before ordering. Need fitment confirmation? Our HVAC parts team verifies compatibility before you buy — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643288342899,"sku":"CARRIE-PF4MNA043T00ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643288375667,"sku":"CARRIE-PF4MNA043T00ABAA-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_49778b33-38b4-495b-a706-36f671edca32.jpg?v=1775041580","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna043t00abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}