{"product_id":"carrier-fa4anf030005afaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V\/24V for FA4ANF030005AFAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model FA4ANF030005AFAA Air Handler\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part# \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier FA4ANF030005AFAA\u003c\/strong\u003e air handler. The control transformer steps down 120V line voltage 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: your thermostat goes blank, the system refuses to respond to any call for heating or cooling, and you may blow the 3A fuse on the board repeatedly. Replacing this component is typically the fastest path to restoring full system operation.\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 FA4ANF030005AFAA air handlers\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by Carrier's control boards. Undersized or off-tolerance generic units can cause nuisance fuse failures, erratic thermostat behavior, and premature control board damage — costing far more in downstream repairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before beginning work. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all low-voltage wiring before disconnecting terminals. Verify incoming line voltage with a multimeter before condemning the transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered and specified for the Carrier \u003cstrong\u003eFA4ANF030005AFAA\u003c\/strong\u003e fan coil\/air handler unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Need help verifying fitment? Our HVAC parts team will confirm compatibility before your order ships — same day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909558653299,"sku":"CARRIE-FA4ANF030005AFAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909558686067,"sku":"CARRIE-FA4ANF030005AFAA-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_9ae95a6a-1bc1-4dad-80db-15fa1faa116c.jpg?v=1782940846","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4anf030005afaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}