{"product_id":"carrier-c48a503051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V-24V for C48A503051","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C48A503051\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 C48A503051\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V 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: your thermostat goes blank, the system won't respond to any commands, and no cooling or heating will occur. If you're getting 120V at the primary but nothing at the secondary, this transformer is almost certainly the culprit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched output for Carrier C48A503051 control circuit requirements\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine OEM Carrier transformer engineered to exact VA and voltage tolerances for the C48A503051. Generic transformers may underperform under peak load, causing nuisance lockouts, contactor chatter, or premature control board failure due to voltage sag.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: multimeter, flat-head and Phillips screwdrivers, wire stripper, needle-nose pliers. Verify 0V at primary terminals before handling. Label and photograph all wiring connections prior to removal.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In stock and ships same business day from our warehouse — get your system back online fast.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC48A503051\u003c\/strong\u003e packaged unit. Always confirm OEM part number HT01BD236 against your unit's wiring diagram or data plate before ordering. Not sure it fits? Our HVAC parts team verifies fitment before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909733405043,"sku":"CARRIE-C48A503051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909733437811,"sku":"CARRIE-C48A503051-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_a06cc437-72b0-40ee-b107-1b70dbe305a1.jpg?v=1782939310","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a503051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}