{"product_id":"carrier-c4850c50aj02761-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V-24V for C4850C50AJ02761","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50AJ02761\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50AJ02761\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to the 24V AC required to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this component fails, the system goes completely silent: the thermostat displays nothing, no relays click, and no call for heating or cooling is answered. A blown transformer is often the first suspect when the unit appears totally dead despite confirmed line voltage at the disconnect.\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 stable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to Carrier's exact VA rating and insulation class, ensuring consistent 24V output under full load. Undersized or off-spec generic transformers can sag voltage under load, causing intermittent lockouts, nuisance tripping, or premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label or photograph all wiring connections before removal. Verify 24V output with a multimeter after installation before closing the cabinet.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty included. Orders ship 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 Carrier \u003cstrong\u003eC4850C50AJ02761\u003c\/strong\u003e packaged unit. Always verify your unit's control circuit voltage and VA requirements against your data plate before ordering. Not sure it fits? Our HVAC parts specialists confirm fitment before you buy — no guesswork, no returns headache.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909843833203,"sku":"CARRIE-C4850C50AJ02761-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909843865971,"sku":"CARRIE-C4850C50AJ02761-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_06a2d66c-7edb-452f-b318-e07e972aa243.jpg?v=1782939291","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50aj02761-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}