{"product_id":"carrier-c4850c50z3035200-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Transformer for C4850C50Z3035200 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50Z3035200\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50Z3035200\u003c\/strong\u003e packaged unit. The transformer steps down 120V primary voltage to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When the transformer fails, the entire control circuit goes dead: the thermostat goes blank, the system won't respond to calls for heating or cooling, and no components energize. This is one of the first components to check when a unit shows absolutely no sign of life despite having line voltage present.\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 full low-voltage circuit stability\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for the Carrier control circuit. Undersized or off-tolerance generic units can sag under load, causing intermittent lockouts, nuisance tripping of the 3A fuse, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify zero voltage with a multimeter before touching any wiring. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or terminal connectors. Photograph all wiring connections before removal. Replace the low-voltage fuse at the same time as a best practice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before 3PM ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier C4850C50Z3035200\u003c\/strong\u003e packaged unit. Always verify the OEM part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e against your unit's wiring diagram or data plate before ordering. If you have questions about fitment, our HVAC parts specialists confirm compatibility before you buy — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909797269875,"sku":"CARRIE-C4850C50Z3035200-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909797302643,"sku":"CARRIE-C4850C50Z3035200-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_ae80ca11-14be-4a28-bb2a-0311961428a4.jpg?v=1782899413","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50z3035200-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}