{"product_id":"carrier-c50a203564-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A203564","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD702 for Model C50A203564\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C50A203564\u003c\/strong\u003e commercial packaged unit. Its job is to step down line voltage (120V) to the 24V AC signal that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this transformer fails, absolutely nothing in the control circuit responds — the thermostat goes dark, the contactor won't pull in, and the unit sits completely unresponsive even though line voltage is present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V AC | OEM part number HT01BD702 | Factory-wound core for stable output under full load\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and insulated to Carrier's exact VA and thermal specifications. Undersized or off-tolerance generic transformers can sag under load, cause erratic board behavior, or fail prematurely from thermal stress — making OEM the only reliable choice for a commercial unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire nuts or push-in connectors, multimeter to verify 24V output after installation. Label all wires before disconnecting the old unit and confirm polarity on the secondary side.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the \u003cstrong\u003eCarrier C50A203564\u003c\/strong\u003e commercial rooftop\/packaged unit. Always verify the VA rating and primary\/secondary voltages on your existing transformer's data label before ordering to confirm an exact match. Our parts specialists are available to verify fitment — contact us before you order if you have any questions. In stock and ready to ship today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909710958963,"sku":"CARRIE-C50A203564-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909710991731,"sku":"CARRIE-C50A203564-TRANSFORMER-HT01BD702-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-HT01BD702_7a0af1f4-8794-454c-9ef8-e6505f908dab.jpg?v=1782940367","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a203564-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}