{"product_id":"carrier-c4850c50z7075610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50Z7075610 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C4850C50Z7075610\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD236) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z7075610\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When it fails, the entire control system goes dark: the thermostat goes blank, the system won't respond to any command, and there is no call for heating or cooling. A blown transformer is often caused by a short in the control wiring or a failed secondary component that drew excess current.\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 for Carrier low-voltage control circuits\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or off-tolerance generic units can overheat, trip thermal cutouts, or fail prematurely — leaving you with a repeat no-power diagnosis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (verify 24V output after install). Always inspect low-voltage wiring for shorts before energizing the new transformer.\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 Fits Carrier model C4850C50Z7075610 packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit's data plate before ordering. If you're unsure about fitment, our HVAC parts team is available to confirm compatibility before you buy — same-day shipping on all in-stock orders.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909786259827,"sku":"CARRIE-C4850C50Z7075610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909786292595,"sku":"CARRIE-C4850C50Z7075610-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_3f48b8e2-4b91-4958-878b-5d3dc9afa7f5.jpg?v=1782939034","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z7075610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}