{"product_id":"carrier-c48a303061-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A303061 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C48A303061\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A303061\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal required by the control board, thermostat, contactor coil, and all low-voltage components. When this part fails, the entire control circuit goes dead — the thermostat shows no response, the system won't call for heating or cooling, and no components energize. A failed transformer is often misdiagnosed as a bad thermostat or control board, making correct diagnosis essential before replacing costlier parts.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Class 2 low-voltage output | Factory-matched OEM dimensions and terminal configuration for direct drop-in installation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound to Carrier's exact VA rating and insulation class. Generic transformers frequently use undersized windings that overheat under full control-circuit load, causing nuisance trips and premature failure of downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Label all low-voltage wires before disconnecting. Confirm primary fuse or circuit protection after installation.\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 NationalHVACParts.com warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003eCarrier C48A303061\u003c\/strong\u003e packaged unit. Verify your unit's data plate shows 120V primary control voltage and 24V secondary before ordering. If your system runs a 208\/240V primary transformer, do not substitute — contact our fitment team for the correct part. Order today and get same-day shipping on all in-stock OEM Carrier parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909753098611,"sku":"CARRIE-C48A303061-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909753131379,"sku":"CARRIE-C48A303061-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_edc40754-c04f-47c6-9c4f-b2417646c44c.jpg?v=1782939156","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a303061-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}