{"product_id":"carrier-c4850c50zn055200-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50ZN055200 — Ships Today","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C4850C50ZN055200\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 C4850C50ZN055200\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to 24V AC, powering the thermostat, control board, contactor coil, and all low-voltage control circuit components. When this transformer fails, nothing in the control circuit responds — the thermostat goes blank, the system won't call for heating or cooling, and the unit appears completely dead despite having line voltage present. A shorted transformer may also blow the control circuit fuse repeatedly.\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 output voltage for reliable control circuit operation\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-tolerance generic transformers can overheat under normal control circuit loads, causing intermittent lockouts and shortened service life.\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 stripper, multimeter. Label or photograph all low-voltage wiring connections before disconnecting. Verify primary and secondary voltages after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for Carrier model \u003cstrong\u003eC4850C50ZN055200\u003c\/strong\u003e packaged units. Verify the transformer's VA rating and primary\/secondary voltage on your unit's wiring diagram or data plate before ordering. Our fitment team is available to confirm compatibility before you buy — same-day shipping ensures you're back up and running fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909772464499,"sku":"CARRIE-C4850C50ZN055200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909772497267,"sku":"CARRIE-C4850C50ZN055200-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_86177a3e-533e-4208-b6ba-e935ad14938a.jpg?v=1782939074","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50zn055200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}