{"product_id":"carrier-c4850c50zg050200-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZG050200 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C4850C50ZG050200\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50ZG050200\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V AC 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 shows no power, the system will not respond to calls for heating or cooling, and no outputs will energize. It is often the first component to suspect when everything else checks out.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 120V AC | Output: 24V AC | Rating: 40VA | OEM Part Number: HT01BD236 | Factory-matched for Carrier C4850C50ZG050200 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to exact VA and voltage specifications. Generic transformers can deliver inconsistent output voltage, causing nuisance lockouts, failed contactor pulls, or premature control board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Confirm secondary output reads 24–28V AC after installation before restoring control wiring. Label all low-voltage leads before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship same business day from our climate-controlled parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC4850C50ZG050200\u003c\/strong\u003e packaged unit. Always verify input voltage, output voltage, and VA rating on your unit's data plate before ordering. If you need fitment confirmation, 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":62909780164979,"sku":"CARRIE-C4850C50ZG050200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909780197747,"sku":"CARRIE-C4850C50ZG050200-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_0b24d04f-96c8-4a99-8245-2af2fe5840ca.jpg?v=1782899207","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zg050200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}