{"product_id":"carrier-fy5bnf042015aaaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 120V\/24V for FY5BNF042015AAAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model FY5BNF042015AAAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier FY5BNF042015AAAA\u003c\/strong\u003e fan coil unit. The transformer steps line voltage down from 120V to 24V AC, powering the low-voltage control circuit that connects your thermostat, control board, and safety switches. When the transformer fails, the entire control circuit loses power — symptoms include a completely unresponsive thermostat, a blank control board, or a system that won't start under any condition despite having line power at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01CN241 | Factory-matched output tolerance for stable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers maintain precise 24V output under full VA load, protecting sensitive control boards and communicating thermostats. Generic units can sag under load, causing intermittent lockouts and premature board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (verify 24V output after install). Always label or photograph existing wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff 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 Carrier \u003cstrong\u003eFY5BNF042015AAAA\u003c\/strong\u003e fan coil unit. Confirm primary voltage (120V) and VA rating on your existing transformer's label before ordering. If your system has a 208V or 240V primary transformer, do not substitute this unit. Our fitment team is available to verify compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909458645363,"sku":"CARRIE-FY5BNF042015AAAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909458678131,"sku":"CARRIE-FY5BNF042015AAAA-TRANSFORMER-HT01CN241-GEN","price":18.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-HT01CN241_5b4b8100-864b-480f-97c1-1364004e16ae.jpg?v=1782941281","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fy5bnf042015aaaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}