{"product_id":"carrier-c4850c50zt090610-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZT090610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50ZT090610\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50ZT090610\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal required by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat goes blank, the system won't respond to any call for heating or cooling, and no fault codes will appear because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched impedance and thermal protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA rating and insulation class. Undersized or off-tolerance generic transformers can overheat under contactor coil load, blow internal fuses, or cause nuisance lockouts — especially in packaged units where multiple loads draw simultaneously on a single transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter to verify 24V output after installation. Label and photograph all wiring connections before removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by 3PM EST ship 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 \u003cstrong\u003eCarrier C4850C50ZT090610\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the data plate or wiring diagram before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909768728947,"sku":"CARRIE-C4850C50ZT090610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909768761715,"sku":"CARRIE-C4850C50ZT090610-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_826de841-2762-49f0-a1a3-214f734d7cdf.jpg?v=1782899261","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zt090610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}