{"product_id":"carrier-pf1mnc030000aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF1MNC030000AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Transformer 208\/230V–24V (HT01CN241) for Model PF1MNC030000AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified control-circuit transformer for the \u003cstrong\u003eCarrier PF1MNC030000AAAA\u003c\/strong\u003e fan coil and air handler. It steps line voltage down from 208\/230V on the primary side to a safe 24V on the secondary side, powering the thermostat wiring, control board logic, and all low-voltage relay coils throughout the system. When this transformer fails, the entire control circuit goes dead — the thermostat shows no response, the system refuses to start, and no fault codes are generated because the board itself has lost power. A burned or shorted transformer is often accompanied by a faint burnt-plastic odor near the air handler cabinet.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V primary | 24V secondary | 40VA power rating | Direct OEM replacement for Carrier PF1MNC030000AAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part built to exact OEM voltage and VA tolerances. Off-brand transformers frequently run under-rated VA capacity, causing thermal shutdowns and premature failure of downstream control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the air handler at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after installation). Label or photograph all low-voltage wiring connections before disconnecting the old unit. Secure all wire-nut connections firmly after reinstall.\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 as a direct OEM drop-in replacement for the \u003cstrong\u003eCarrier PF1MNC030000AAAA\u003c\/strong\u003e fan coil\/air handler. Always verify your existing transformer's primary voltage (208V or 230V) and VA rating on the data plate before ordering — mismatched VA ratings are the leading cause of repeat transformer failure. Questions about fitment? Our HVAC parts specialists verify compatibility before your order ships.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643339166067,"sku":"CARRIE-PF1MNC030000AAAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643339198835,"sku":"CARRIE-PF1MNC030000AAAA-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_315b6ba3-904a-41c6-a940-5c088f279113.jpg?v=1775041513","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf1mnc030000aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}