{"product_id":"carrier-c4850c48zg055900-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V-24V for C4850C48ZG055900","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C48ZG055900\u003c\/h1\u003e\u003cp\u003eThis is the factory-specified OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C48ZG055900\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit, including the thermostat, contactor coil, and control board. When the transformer fails, the entire control circuit goes dead — the thermostat loses power, the system won't respond to any calls for heating or cooling, and you may detect a burning odor near the transformer or find the internal fuse blown.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 120VAC | Output 24VAC | 40VA rated | OEM part number HT01BD236 | Factory-matched for Carrier C4850C48ZG055900\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and rated to exact factory specifications, ensuring stable 24V output under full control-circuit load. Generic units may underperform under load, causing erratic contactor chatter and intermittent lockouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or push-in connectors. Label all low-voltage wiring before removing the old unit.\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 warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC4850C48ZG055900\u003c\/strong\u003e packaged unit. Always verify input\/output voltage and VA rating against your unit's data plate before ordering. If you need fitment confirmation, our HVAC parts specialists are available to verify compatibility before you purchase — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909863494003,"sku":"CARRIE-C4850C48ZG055900-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909863526771,"sku":"CARRIE-C4850C48ZG055900-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_2a76e741-ee86-45fa-8e9b-9a54f16d4c3c.jpg?v=1782939286","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zg055900-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}