{"product_id":"carrier-c4850c50zn050200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50ZN050200 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C4850C50ZN050200\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C4850C50ZN050200\u003c\/strong\u003e packaged unit. It converts 120V line voltage to the 24V AC signal that powers your control board, thermostat circuit, and all low-voltage safety controls. When this transformer fails, the entire control circuit goes dead — the thermostat displays nothing, the system won't respond to any call for heating or cooling, and no error codes appear because the board itself has no power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Class 2 transformer | Direct OEM replacement for part number HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications for this unit. Undersized or off-tolerance generics can overheat under load, trip thermal cutoffs, or cause erratic low-voltage behavior that mimics board failure — wasting time and money on misdiagnosed repairs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Label or photograph all low-voltage wiring before disconnecting terminals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for the Carrier \u003cstrong\u003eC4850C50ZN050200\u003c\/strong\u003e packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. If you're unsure of fitment, our HVAC parts team can verify compatibility before you buy — same-day shipping available on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909774266739,"sku":"CARRIE-C4850C50ZN050200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909774299507,"sku":"CARRIE-C4850C50ZN050200-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_914df58c-4862-4fc8-8801-c515458ffb94.jpg?v=1782939067","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zn050200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}