{"product_id":"carrier-fv4anf002000acaa-transformer-h3hww2","title":"OEM Carrier Transformer 40VA 120V\/24V for FV4ANF002000ACAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model FV4ANF002000ACAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01CN236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier FV4ANF002000ACAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, nothing works: the thermostat goes blank, the system won't respond to any calls for heating or cooling, and the control board receives no power. A failed transformer is often misdiagnosed as a bad control board or thermostat, so always verify 24V output at the secondary terminals before replacing other components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 output | OEM part number HT01CN236 | Factory-matched to FV4ANF002000ACAA wiring harness\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01CN236 transformer is wound to exact VA and voltage tolerances required by the Carrier control board. Generic transformers with loose VA ratings can sag under load, causing nuisance lockouts, erratic thermostat behavior, and premature contactor wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify voltage is off with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label and photograph all low-voltage wiring before disconnecting. Installation typically takes 20–30 minutes for an experienced DIYer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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 specifically for the \u003cstrong\u003eCarrier FV4ANF002000ACAA\u003c\/strong\u003e fan coil air handler. Confirm your unit's data plate lists 120V\/24V 40VA transformer requirements before ordering. If you're unsure of fitment, our HVAC parts specialists are available to verify compatibility before you purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909496557939,"sku":"CARRIE-FV4ANF002000ACAA-TRANSFORMER-HT01CN236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909496590707,"sku":"CARRIE-FV4ANF002000ACAA-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_60ffa45d-e579-4e81-8c3c-e47965fdcfc0.jpg?v=1782941101","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fv4anf002000acaa-transformer-h3hww2","provider":"National HVAC Parts","version":"1.0","type":"link"}