{"product_id":"carrier-c48a302051-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C48A302051 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C48A302051\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C48A302051\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V low-voltage signal that powers your thermostat, contactor coil, and all control board logic. When the transformer fails — whether from a shorted wire, a blown fuse, or voltage spike — the entire control circuit goes dark: your thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing operates.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD236 | Factory-matched impedance and thermal protection for the C48A302051 control circuit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and impedance tolerances required by the Carrier control board. Undersized or off-tolerance generic transformers can overheat, trip thermal cutoffs prematurely, or fail to sustain the 24V signal under full contactor load — leading to repeat failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Photograph all low-voltage wiring connections before disconnecting. Verify 24V output with a multimeter after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units 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\u003eC48A302051\u003c\/strong\u003e packaged unit. Confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. If your unit has a blown fuse on the secondary side, always identify and correct the root cause (shorted low-voltage wire or failed component) before installing the new transformer to prevent repeat failure. Our fitment team is available to verify compatibility before you order — ships same day.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909756146035,"sku":"CARRIE-C48A302051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909756178803,"sku":"CARRIE-C48A302051-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_74347025-9ef7-46fe-8398-e06bb04f016f.jpg?v=1782899305","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a302051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}