{"product_id":"carrier-c50a506064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A506064","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C50A506064\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eC50A506064\u003c\/strong\u003e commercial packaged unit. The transformer steps down 120V line voltage to the 24V signal used by your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this part fails, the entire control circuit goes dead — the thermostat loses power, the contactor won't energize, and the unit refuses to start in any mode. If your system appears completely unresponsive despite confirmed line voltage, a failed transformer is one of the first components to test.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | Class 2 transformer | Mounts to standard control board bracket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD702 is wound to Carrier's exact VA and voltage tolerance specs. Generic transformers can sag under full load, causing intermittent lockouts, nuisance tripping, or premature contactor coil failure — OEM is the reliable choice.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before servicing. Tools needed: flathead and Phillips screwdrivers, wire nuts or spade connectors, multimeter to verify 24V output after install. Label all wires before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC50A506064\u003c\/strong\u003e commercial rooftop\/packaged unit. Always verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our fitment team is available to confirm compatibility before you buy — no guesswork, no returns.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909666263411,"sku":"CARRIE-C50A506064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909666296179,"sku":"CARRIE-C50A506064-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_a37143d5-6b6b-42d9-b384-61d402e40a48.jpg?v=1782940652","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a506064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}