{"product_id":"carrier-c50a503052-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A503052","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C50A503052\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A503052\u003c\/strong\u003e commercial packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the low-voltage control circuit — including the thermostat, contactor coil, and control board. When this transformer fails, the entire control circuit goes dead: the thermostat loses power, the system refuses to respond to any call for heating or cooling, and no fault codes are generated because the board itself has no power. A failed transformer is often misdiagnosed as a control board or thermostat fault, making it one of the most important components to test first.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched construction for drop-in replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer meets Carrier's exact VA rating and insulation class requirements. Generic transformers often run undersized VA ratings, causing overheating under normal HVAC control loads and premature failure — especially on systems with multiple 24V accessories like humidistats, zone boards, or economizers.\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 terminal connectors. Always verify input and output voltages with a multimeter after installation before restoring full system power.\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 Engineered for the Carrier \u003cstrong\u003eC50A503052\u003c\/strong\u003e commercial rooftop\/packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering to ensure correct fitment. Our HVAC parts specialists are available to confirm compatibility before you purchase.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909672653171,"sku":"CARRIE-C50A503052-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909672685939,"sku":"CARRIE-C50A503052-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_cbf3d009-27a5-4761-bae5-19d2990041f4.jpg?v=1782940595","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a503052-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}