{"product_id":"carrier-c50a402052-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A402052","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C50A402052\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C50A402052\u003c\/strong\u003e commercial rooftop unit. The transformer converts 120V line voltage to the 24V AC signal that powers your control board, thermostat circuit, contactor coils, and all low-voltage components. When this transformer fails, the entire control circuit goes dead — the thermostat shows no response, the contactor won't energize, and the system refuses to start in any mode. A failed transformer is often misdiagnosed as a control board failure, making it a critical first diagnostic check.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary input | 24V secondary output | Factory-wound to OEM tolerances | Compatible with standard 24V HVAC control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to exact factory VA and voltage specifications. Generic transformers frequently underperform under load, causing erratic contactor chatter, nuisance lockouts, and premature control board failures due to voltage sag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Test secondary output (should read ~24–28V AC) before re-energizing the full system. Photograph all wiring connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders ship same business day from our stocked warehouse when placed before 3 PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003eCarrier C50A402052\u003c\/strong\u003e commercial packaged rooftop unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or existing transformer label before ordering. Our fitment team is available to confirm compatibility prior to purchase — no guesswork required. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909691232627,"sku":"CARRIE-C50A402052-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909691265395,"sku":"CARRIE-C50A402052-TRANSFORMER-HT01BD236-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-HT01BD236_f5d1b3de-56f3-4b5c-a570-dd4bc7e7a701.jpg?v=1782940478","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a402052-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}