{"product_id":"carrier-c50a306064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A306064","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C50A306064\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer (part number \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C50A306064\u003c\/strong\u003e commercial packaged unit. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and all safety switches. When this transformer fails, the system goes completely silent: the thermostat loses power, no calls for heating or cooling are processed, and the unit will not respond to any inputs. A failed transformer is often identified by a blown 3A fuse on the control board or a burned smell near the electrical panel.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | OEM part number: HT01BD702 | Factory-matched for Carrier C50A306064\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact factory VA and impedance specifications. Generic replacements can under-deliver on VA capacity, causing nuisance fuse failures and unreliable control circuit performance — especially under high-load conditions with multiple accessories.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 3\/5\u003c\/strong\u003e — Disconnect all power before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, needle-nose pliers. Test incoming 120V and outgoing 24V with a multimeter to confirm the transformer is the failed component before replacing. Always replace the control board fuse if blown.\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 and factory-specified for the Carrier \u003cstrong\u003eC50A306064\u003c\/strong\u003e commercial rooftop\/packaged unit. Verify your unit's control circuit voltage and VA requirements on the data plate before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909688185203,"sku":"CARRIE-C50A306064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909688217971,"sku":"CARRIE-C50A306064-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_ba5d5368-6843-4fc4-9ad8-382712b0f8e1.jpg?v=1782940476","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a306064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}