{"product_id":"carrier-c4850c48zw090610-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C48ZW090610 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C48ZW090610\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C48ZW090610\u003c\/strong\u003e packaged unit. The transformer steps line voltage (120V) down to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching components. When the transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any calls for heating or cooling, and no relays or contactors will energize. It is one of the first components to check when a unit shows absolutely zero response.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary: 120V AC | Secondary: 24V AC | VA Rating: 40VA | OEM Part Number: HT01BD236 | Factory-matched for Carrier C4850C48ZW090610 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and rated to exact factory specifications, ensuring consistent 24V output under full load. Generic transformers may undervolt the control circuit under demand, causing erratic lockouts, nuisance trips, 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 and confirm voltage is absent before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Note primary and secondary wire connections before removing the old transformer. Reconnect matching wire gauges and insulate all splices.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock units ship same business day when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed as a direct OEM replacement for the Carrier \u003cstrong\u003eC4850C48ZW090610\u003c\/strong\u003e packaged unit. Always verify the 40VA rating and input\/output voltage on your unit's data plate before ordering. If you need fitment confirmation, our parts specialists will verify compatibility before your order ships — same business day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909847306611,"sku":"CARRIE-C4850C48ZW090610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909847339379,"sku":"CARRIE-C4850C48ZW090610-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_4dfb28d3-8037-48df-9bb7-7d3d3f39bece.jpg?v=1782899101","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c48zw090610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}