{"product_id":"carrier-fa4anf048010afaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V\/24V for FA4ANF048010AFAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model FA4ANF048010AFAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier FA4ANF048010AFAA\u003c\/strong\u003e air handler unit. The transformer converts 120V line voltage to the 24V AC signal that powers the entire control circuit — including the thermostat, control board, contactor coil, and zone controls. When this transformer fails, the result is complete control system shutdown: a blank thermostat, an unresponsive air handler, and no heating or cooling whatsoever. It is often one of the first components to check when the system appears totally dead despite confirmed line voltage at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120V AC | Output 24V AC | 40VA rating | OEM part number HT01CN236 | Factory-matched winding and insulation class for reliable low-voltage signal delivery\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 ratings and insulation specs. Generic transformers often carry inconsistent VA output, which can cause nuisance tripping of the transformer's internal thermal fuse or unstable low-voltage control signals that lead to misdiagnosis of the control board.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire strippers, multimeter, needle-nose pliers. Label all wires before removal. The transformer mounts to the air handler cabinet with two screws and connects via quick-connect or screw terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock and ships same business day from our warehouse — your repair stays on schedule.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eFA4ANF048010AFAA\u003c\/strong\u003e fan coil \/ air handler unit. Always verify your existing transformer's input\/output voltage and VA rating against your unit's data plate before ordering. Our HVAC parts specialists are available to confirm fitment before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909556457843,"sku":"CARRIE-FA4ANF048010AFAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909556490611,"sku":"CARRIE-FA4ANF048010AFAA-TRANSFORMER-HT01CN236-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-HT01CN236_684cec46-4db5-4f42-8247-a454a29bb441.jpg?v=1782940856","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4anf048010afaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}