{"product_id":"carrier-c4850c50zw075610-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Transformer HT01BD236 for C4850C50ZW075610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50ZW075610\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C4850C50ZW075610\u003c\/strong\u003e packaged unit. The transformer steps line voltage (120V) down to the 24V signal voltage required to power the thermostat, control board, contactors, and all low-voltage control circuits. When this component fails, the entire control system goes dark — the thermostat loses power, no calls for heating or cooling are processed, and the unit is completely unresponsive. A failed transformer is often indicated by a blown 3A control fuse or a burning smell near the control panel.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched impedance and VA capacity for Carrier C4850C50ZW075610\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Carrier's exact VA rating and insulation class. Undersized or off-brand transformers can sag under inductive load, causing nuisance lockouts, relay chatter, and premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before servicing. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade terminals, multimeter to verify 24V output after installation. Always confirm the cause of transformer failure (shorted low-voltage wiring) before replacing to avoid repeat burnout.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier model \u003cstrong\u003eC4850C50ZW075610\u003c\/strong\u003e packaged unit. Verify primary voltage and VA rating on your unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists are available to confirm compatibility before you buy — no guesswork required. Order today and get back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909767942515,"sku":"CARRIE-C4850C50ZW075610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909767975283,"sku":"CARRIE-C4850C50ZW075610-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_eb836ef7-632e-4bd9-8c31-c6a23619bf95.jpg?v=1782899454","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zw075610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}