{"product_id":"carrier-c48a303052-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A303052 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C48A303052\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C48A303052\u003c\/strong\u003e packaged unit. The control transformer steps down line voltage (120V) to the 24V signal required by your thermostat, contactor coils, gas valve, and control board. When the transformer fails, the entire control circuit goes dead — your thermostat will display nothing, the system won't respond to any calls for heating or cooling, and nothing will operate. It is often the first component to inspect when a unit shows zero signs of life.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V | Secondary: 24V | Factory-matched OEM tolerances | Part Number: HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound and insulated to Carrier's exact specifications, ensuring stable 24V output under full load. Generic transformers frequently sag below 24V when multiple components draw current simultaneously, causing erratic lockouts and nuisance trips.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect box and verify with a non-contact voltage tester before proceeding. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter to confirm 24V output after installation. Always note wire colors and terminal positions before disconnecting the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship 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\u003eC48A303052\u003c\/strong\u003e packaged gas\/electric unit. Before ordering, confirm the transformer VA rating and primary\/secondary voltages on your unit's data plate match this specification. If your system uses a 75VA transformer, a different part number will apply. Have questions about fitment? Our HVAC parts specialists verify compatibility before your order ships — reach out today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909753229683,"sku":"CARRIE-C48A303052-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909753262451,"sku":"CARRIE-C48A303052-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_081c0ad1-eb1a-4185-ac3d-b6e2cded2745.jpg?v=1782939153","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a303052-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}