{"product_id":"carrier-c4850c50zn040600-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50ZN040600 — HT01BD236 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50ZN040600 — Part HT01BD236\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50ZN040600\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When the transformer 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 error codes are displayed because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched output tolerance for reliable low-voltage control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer wound to factory VA and voltage specifications. Generic transformers frequently run undersized, causing voltage sag under load that trips safety lockouts or burns contactor coils prematurely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify with a non-contact voltage tester before touching any wiring. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all wiring connections before removal. Check and replace any blown 3A or 5A fuses on the control board at the same time.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the \u003cstrong\u003eCarrier C4850C50ZN040600\u003c\/strong\u003e packaged unit. Always verify your unit's data plate voltage requirements and existing transformer VA rating before ordering to ensure a correct fit. Not sure it's the right part? Our HVAC parts specialists confirm fitment before you buy — reach out before placing your order and we'll verify compatibility fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909774922099,"sku":"CARRIE-C4850C50ZN040600-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909774954867,"sku":"CARRIE-C4850C50ZN040600-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_f64bc250-3184-4dfa-bfbf-df8282aacc2c.jpg?v=1782899239","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zn040600-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}