{"product_id":"carrier-fa4anc030010agaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V\/24V for FA4ANC030010AGAA","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model FA4ANC030010AGAA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) is the factory-specified 40VA step-down transformer for the \u003cstrong\u003eCarrier FA4ANC030010AGAA\u003c\/strong\u003e air handler. The transformer converts 120V line voltage down to the 24V signal voltage that powers your control board, thermostat, and all low-voltage control circuits. When this transformer fails — often due to a short in the control circuit or wiring fault — absolutely nothing in the system responds: the thermostat goes blank, the air handler won't call for heating or cooling, and the system appears completely dead despite having line power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA transformer | Primary: 120V AC | Secondary: 24V AC | Factory OEM part number HT01CN236 | Direct drop-in replacement with original mounting footprint and wire leads\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the factory-matched OEM unit, wound to exact VA and voltage tolerances. Generic transformers can deliver inconsistent secondary voltage, causing erratic thermostat behavior, nuisance lockouts, and premature control board failure — false economy on a critical component.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, multimeter (confirm 0V before touching wires). Photograph all wire connections before disconnecting the old transformer. Note: always check for a shorted control wire or stuck contactor coil before installing the new transformer, or the replacement will fail immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. In-stock and ships 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\u003eFA4ANC030010AGAA\u003c\/strong\u003e air handler. Verify your existing transformer's VA rating and primary\/secondary voltages on the data plate before ordering to ensure fitment. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you order — contact us today and we'll confirm the correct part for your unit.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909567435123,"sku":"CARRIE-FA4ANC030010AGAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909567467891,"sku":"CARRIE-FA4ANC030010AGAA-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_6d253d25-0082-4b8b-bbac-65ee9b97aeaa.jpg?v=1782940814","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fa4anc030010agaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}