{"product_id":"carrier-pf4mna048l00aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNA048L00AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01CN241 for Model PF4MNA048L00AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PF4MNA048L00AAAA\u003c\/strong\u003e air handler. The transformer steps down 208\/230V line voltage to the 24V DC signal that powers your thermostat, control board, and all low-voltage safety circuits. When this part fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any call for heating or cooling, and no fault codes will display because the board itself has no power.\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 number HT01CN241\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers frequently run under-rated VA, causing the secondary to sag under load and triggering nuisance lockouts or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter to verify 24V output after installation. Photograph all low-voltage wiring before disconnecting terminals.\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 cutoff time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePF4MNA048L00AAAA\u003c\/strong\u003e air handler. Always verify your unit's data plate voltage rating matches the 208\/230V primary specification before ordering. Not sure it fits? Our HVAC parts team verifies fitment before you buy — contact us before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643286475123,"sku":"CARRIE-PF4MNA048L00AAAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643286507891,"sku":"CARRIE-PF4MNA048L00AAAA-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_54efb31f-2ab4-495c-a884-bf04246b5b83.jpg?v=1775041582","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna048l00aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}