{"product_id":"carrier-fx4dnf031008abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 24V for FX4DNF031008ABAA — HT01CN241","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model FX4DNF031008ABAA — Part# HT01CN241\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier FX4DNF031008ABAA\u003c\/strong\u003e air handler. The transformer steps down 120V line voltage to 24V AC to power the low-voltage control circuit — including your thermostat, contactor coils, and control board. When it fails, the entire control circuit goes dead: the thermostat goes blank, no signals reach the air handler, and neither heating nor cooling will respond. A failed transformer is often misdiagnosed as a thermostat or control board issue, so always check transformer output voltage first with a multimeter.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Factory OEM part number HT01CN241 | Engineered to Carrier's exact impedance and insulation class specifications\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer built to factory tolerances. Generic transformers frequently underperform on VA capacity, causing nuisance tripping of the secondary fuse and shortened service life under full control-circuit load.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Verify 24V output after installation before restoring full system power.\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 fulfillment center.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier FX4DNF031008ABAA\u003c\/strong\u003e fan coil air handler. Confirm your unit's data plate shows part number HT01CN241 or cross-reference your existing transformer's VA and voltage ratings before ordering. Our HVAC parts specialists are available to verify fitment — order with confidence and receive same-day shipping on all in-stock components.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909477060979,"sku":"CARRIE-FX4DNF031008ABAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909477093747,"sku":"CARRIE-FX4DNF031008ABAA-TRANSFORMER-HT01CN241-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-HT01CN241_52c86853-711f-4a89-9199-671e5d7fa9a5.jpg?v=1782942571","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fx4dnf031008abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}