{"product_id":"carrier-c50a503564-transformer-h301d7","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A503564","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V to 24V for Model C50A503564\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 C50A503564\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage required to power your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dead — the thermostat displays nothing, the system will not respond to any call for heating or cooling, and your multimeter will read 0V at the secondary terminals.\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 | Replaces factory-installed transformer on Carrier C50A503564 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM unit is wound to exact factory VA and impedance specifications. Undersized or off-tolerance generic transformers can overheat, trip internal thermal fuses prematurely, or deliver unstable 24V output that causes nuisance lockouts and erratic board behavior.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage before starting. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wiring connections prior to removal. The transformer typically mounts to the control panel with two screws and uses push-on or screw-terminal connections on both primary and secondary sides.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. 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 Designed specifically for the Carrier \u003cstrong\u003eC50A503564\u003c\/strong\u003e commercial packaged rooftop unit. Verify your existing transformer's primary\/secondary voltage and VA rating on the data plate or unit wiring diagram before ordering. If your system is experiencing repeated transformer failures, inspect the low-voltage wiring for shorts before installing the replacement. Our fitment team is available to confirm compatibility before you buy — same-day shipping available on in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909670097267,"sku":"CARRIE-C50A503564-TRANSFORMER-HT01BD702","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909670130035,"sku":"CARRIE-C50A503564-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_f5ae0866-7bb6-4fee-9865-b632baed78d2.jpg?v=1782940614","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a503564-transformer-h301d7","provider":"National HVAC Parts","version":"1.0","type":"link"}