{"product_id":"carrier-c4850c50z8075610-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C4850C50Z8075610","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C4850C50Z8075610\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z8075610\u003c\/strong\u003e packaged unit. The transformer steps line voltage (120V) down to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this component fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any call for heating or cooling, and no error codes are displayed because the board itself has no power. A failed transformer is often misdiagnosed as a bad thermostat or control board, making correct identification critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Class 2 control circuit transformer | OEM Part Number: HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact Carrier factory specifications, ensuring proper VA capacity and voltage regulation. Undersized or off-tolerance generic transformers can overheat, blow internal fuses, and damage downstream control boards — a costly consequence of a cheap repair.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Label or photograph all wire connections before removal. Check for a shorted load (e.g., stuck contactor coil) that may have caused the original failure.\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 Designed for the Carrier \u003cstrong\u003eC4850C50Z8075610\u003c\/strong\u003e packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. If you have questions about fitment, our HVAC parts specialists verify compatibility before you buy — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909785112947,"sku":"CARRIE-C4850C50Z8075610-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909785145715,"sku":"CARRIE-C4850C50Z8075610-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_057629b4-2e3e-45f6-841d-ad762eab29e9.jpg?v=1782940145","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z8075610-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}