{"product_id":"carrier-c4850c50z2060500-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z2060500 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50Z2060500\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z2060500\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to the 24V signal used by your thermostat, contactor coil, gas valve, and control board. When it fails, the entire low-voltage control circuit goes dead — nothing responds, the thermostat goes blank, and the system will not start in any mode. A failed transformer is often the first diagnosis when absolutely nothing works.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | Replaces OEM part number HT01BD236 | Factory-matched construction for full low-voltage circuit compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage specifications, ensuring stable 24V output under full load. Generic units can sag under load, causing erratic thermostat behavior, 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 verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Photograph all wiring before disconnecting terminals.\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 \u003cstrong\u003eCarrier C4850C50Z2060500\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. If you're unsure of fitment, our HVAC parts specialists will confirm compatibility before your order ships — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909801267571,"sku":"CARRIE-C4850C50Z2060500-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909801300339,"sku":"CARRIE-C4850C50Z2060500-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_2ba4d87f-1d32-4946-8dd9-0e157c401416.jpg?v=1782939013","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z2060500-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}