{"product_id":"carrier-fa4anf018008afaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V\/24V for FA4ANF018008AFAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model FA4ANF018008AFAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier FA4ANF018008AFAA\u003c\/strong\u003e air handler. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including the thermostat, control board, and zone valves. When this component fails, the entire control system goes dark: the thermostat becomes unresponsive, the system won't call for heating or cooling, and no error codes will display because the board itself has lost power.\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 HT01CN236 | Factory-matched for Carrier FA4ANF018008AFAA air handlers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer, wound to exact VA and voltage tolerances. Undersized or off-tolerance generic transformers can overheat under full control load, blow internal fuses, or deliver insufficient voltage to the control board — causing erratic operation or repeat failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and confirm voltage is absent with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connects. Label all low-voltage wires before removal. Check for a shorted thermostat wire or stuck contactor coil before installing the new transformer — these are the most common causes of transformer failure.\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.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the \u003cstrong\u003eCarrier FA4ANF018008AFAA\u003c\/strong\u003e air handler. Verify your unit's control circuit voltage requirements on the data plate before ordering — most residential air handlers use 24V\/40VA, but commercial or multi-zone applications may require a higher VA rating. Our fitment team is available to confirm compatibility before you order. Order today and receive same-day shipping on all in-stock parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909562159475,"sku":"CARRIE-FA4ANF018008AFAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909562192243,"sku":"CARRIE-FA4ANF018008AFAA-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_e699e71a-b581-443a-8d86-f0cf244fb353.jpg?v=1782940833","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4anf018008afaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}