{"product_id":"carrier-c48a703064-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C48A703064","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model C48A703064\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01BD702\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C48A703064\u003c\/strong\u003e packaged unit. It steps down 120V line voltage to the 24V signal required by your thermostat, contactor coil, gas valve, and control board. When this transformer fails, the entire control circuit goes dead — the thermostat loses power, nothing responds, and the system will not start at all. It is often the first component to check when a unit shows zero control-side activity.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD702 | Factory-matched output tolerance for stable low-voltage control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer engineered to exact VA and voltage specifications. Undersized or off-tolerance generic units can cause nuisance tripping, contactor chatter, and premature control board failure — OEM ensures a clean, stable 24V supply.\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, multimeter, wire nuts or spade connectors. Verify secondary output (24V ±10%) with a multimeter before buttoning up the unit. Always label wires before disconnecting.\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 Carrier \u003cstrong\u003eC48A703064\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages against your unit's data plate before ordering. If you're unsure about fitment, our HVAC parts specialists can confirm compatibility before you buy — same-day shipping available on all stocked OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909723804019,"sku":"CARRIE-C48A703064-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909723836787,"sku":"CARRIE-C48A703064-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_ef2bc7c0-4af9-41a8-896c-c4f62e0f30ab.jpg?v=1782940270","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a703064-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}