{"product_id":"carrier-pf4mna043l00abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PF4MNA043L00ABAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/230V–24V for Model PF4MNA043L00ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part #HT01CN241) is the factory-specified replacement for the \u003cstrong\u003eCarrier PF4MNA043L00ABAA\u003c\/strong\u003e air handler. The transformer steps down line voltage from 208\/230V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire control circuit goes dead: the system will not respond to the thermostat, relays won't energize, and the unit will not operate at all. A failed transformer is often confirmed by measuring 0V AC on the 24V secondary while line voltage is present at the primary.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA output rating | Factory OEM part #HT01CN241 | Direct drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier Factory Authorized Part engineered to exact transformer specifications. Generic 40VA transformers vary in VA capacity and insulation class, risking nuisance trips or premature burnout under full control-circuit load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before starting. Tools needed: multimeter, flathead and Phillips screwdrivers, wire nuts or spade connectors. Photograph and label all low-voltage wiring before disconnecting. Verify 0V at both primary terminals before handling.\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.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003ePF4MNA043L00ABAA\u003c\/strong\u003e air handler. Verify your unit's data plate shows 208\/230V primary input and a 40VA control transformer before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get back to comfort fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62643289194867,"sku":"CARRIE-PF4MNA043L00ABAA-TRANSFORMER-HT01CN241","price":108.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62643289227635,"sku":"CARRIE-PF4MNA043L00ABAA-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_aa7a47d0-3e1a-4c20-a327-eaa17e22597a.jpg?v=1775041577","url":"https:\/\/nationalhvacparts.com\/products\/carrier-pf4mna043l00abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}