{"product_id":"carrier-fx4dnf031000abaa-transformer-h3hwwy","title":"OEM Carrier Transformer 40VA 24V for FX4DNF031000ABAA — HT01CN241","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model FX4DNF031000ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01CN241\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier FX4DNF031000ABAA\u003c\/strong\u003e fan coil air handler. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — your thermostat will show no response, the system won't call for heating or cooling, and no components will energize. A blown transformer is often caused by a short in the low-voltage wiring, so always inspect the 24V circuit before installing the replacement.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary input | 24V secondary output | Direct OEM replacement for part# HT01CN241 | Compatible with standard low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers may deliver inconsistent secondary voltage, causing nuisance lockouts, erratic thermostat behavior, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after installation). Always confirm no short exists in the low-voltage wiring before energizing the new transformer.\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 climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eFX4DNF031000ABAA\u003c\/strong\u003e fan coil air handler. Verify your existing transformer's VA rating and primary\/secondary voltages on the data plate before ordering to confirm fitment. Have questions about fit? Our HVAC parts specialists verify compatibility before you buy — contact us anytime.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909477454195,"sku":"CARRIE-FX4DNF031000ABAA-TRANSFORMER-HT01CN241","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909477486963,"sku":"CARRIE-FX4DNF031000ABAA-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_c85776de-e09d-4f6f-988d-0a924cd05e19.jpg?v=1782942569","url":"https:\/\/nationalhvacparts.com\/products\/carrier-fx4dnf031000abaa-transformer-h3hwwy","provider":"National HVAC Parts","version":"1.0","type":"link"}