{"product_id":"carrier-c48a504062-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V-24V for C48A504062","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C48A504062\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A504062\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to 24V, powering the entire low-voltage control circuit — including the thermostat, contactor coil, and safety switches. When it fails, nothing in the system responds: the thermostat goes dark, the unit won't call for heating or cooling, and no diagnostic fault codes appear. A failed transformer is often misdiagnosed as a bad control board, making this an essential first check.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Compatible OEM part numbers: \u003cstrong\u003eHT01BD236\u003c\/strong\u003e and \u003cstrong\u003eHT01BD702\u003c\/strong\u003e | Factory-matched output voltage tolerance for reliable low-voltage operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA ratings and insulation class for your unit. Undersized or off-spec generic units can overheat, blow the secondary fuse, or deliver unstable 24V that causes nuisance lockouts across connected components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always disconnect power at the disconnect switch and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, wire nuts or terminals, multimeter to verify 24V output after install. Photograph all wiring connections before removal.\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\u003eC48A504062\u003c\/strong\u003e packaged unit. Verify primary voltage (120V) and VA rating on your unit's data plate or existing transformer label before ordering. OEM part numbers HT01BD236 and HT01BD702 are both covered by this listing. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — reach out before purchasing if unsure.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909730455923,"sku":"CARRIE-C48A504062-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909730488691,"sku":"CARRIE-C48A504062-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_7bf2d1e1-0c3c-4892-a13b-b7b817be183a.jpg?v=1782939315","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a504062-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}