{"product_id":"carrier-c50a503552-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A503552","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C50A503552\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A503552\u003c\/strong\u003e commercial rooftop unit. The transformer steps down 120V line voltage to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coils, gas valve, and control board. When this transformer fails, absolutely nothing works: the thermostat goes dark, the system won't respond to any call for heating or cooling, and you may find a blown fuse on the control board from a secondary-side short.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | Replaces OEM part number HT01BD236 | Factory-matched output tolerance for reliable low-voltage operation\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 voltage specifications. Generic alternatives often run under-rated VA, causing thermal shutdowns and nuisance blown fuses under normal control circuit loads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 24V output after install). Always verify no secondary-side short exists before replacing the transformer — a shorted wire will destroy the new unit immediately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the Carrier \u003cstrong\u003eC50A503552\u003c\/strong\u003e commercial packaged rooftop unit. Verify primary voltage (120V) and VA rating on your unit's wiring diagram or data plate before ordering. Our HVAC parts specialists are available to confirm fitment — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909671637363,"sku":"CARRIE-C50A503552-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909671670131,"sku":"CARRIE-C50A503552-TRANSFORMER-HT01BD236-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-HT01BD236_0fccbe59-66e3-4500-944a-6a044ff4d4a6.jpg?v=1782940607","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a503552-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}