{"product_id":"carrier-c48a303562-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C48A303562 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V to 24V for Model C48A303562\u003c\/h1\u003e\u003cp\u003eThis OEM control circuit transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A303562\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal needed to power your thermostat, contactor coil, and all low-voltage controls. When this component fails, the entire control circuit goes dead — the thermostat loses power, the system won't respond to any calls for heating or cooling, and nothing operates. It is one of the first components to test when a system appears completely unresponsive despite confirmed line voltage at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM Part Numbers: \u003cstrong\u003eHT01BD236\u003c\/strong\u003e and \u003cstrong\u003eHT01BD702\u003c\/strong\u003e | Direct plug-in replacement with factory-matched terminals\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to Carrier's exact VA and impedance specifications, ensuring stable 24V output under full control-circuit load. Generic transformers may sag under load, causing erratic contactor chatter or nuisance lockouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Verify 24V secondary output after installation before closing the unit. Always confirm the old transformer is truly failed before replacement — check for a shorted low-voltage wiring fault first, which can blow a new transformer immediately.\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 \u003cstrong\u003eCarrier C48A303562\u003c\/strong\u003e packaged unit. Cross-references OEM part numbers HT01BD236 and HT01BD702. Confirm your unit's control board accepts a standard 40VA 120V\/24V transformer by checking the data plate inside the control access panel before ordering. Our parts specialists are available to verify fitment — reach out before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909751034227,"sku":"CARRIE-C48A303562-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909751066995,"sku":"CARRIE-C48A303562-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_d116ed71-ec27-48ee-bcc0-816b0f0d7fd1.jpg?v=1782939159","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a303562-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}