{"product_id":"carrier-c50a203551-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A203551","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C50A203551\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) designed for the \u003cstrong\u003eCarrier C50A203551\u003c\/strong\u003e commercial rooftop unit. The transformer steps down 120V line voltage to the 24V control circuit voltage required by your thermostat, contactor coil, gas valve, and all low-voltage controls. When this transformer fails, the entire control circuit goes dark — symptoms include a completely unresponsive thermostat, a contactor that won't energize, or a system that won't respond to any call for heat or cooling despite line voltage being present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | Factory-matched OEM part number HT01BD236 | Designed for Carrier C50A203551 commercial rooftop platform\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound to exact Carrier specifications, ensuring proper VA capacity and voltage regulation under full control-circuit load. Undersized or generic transformers can cause erratic low-voltage behavior, nuisance tripping, or premature failure of downstream components like contactors and gas valves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 3\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter, and insulated terminals. Confirm primary and secondary wiring labels before disconnecting old unit. A blown transformer may indicate a low-voltage short — check wiring for faults before installing replacement.\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 HVAC parts warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered specifically for the Carrier \u003cstrong\u003eC50A203551\u003c\/strong\u003e commercial rooftop unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering to confirm fitment. Our parts specialists are available to verify compatibility before you purchase — don't guess on a control circuit component.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909713219955,"sku":"CARRIE-C50A203551-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909713252723,"sku":"CARRIE-C50A203551-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_835fd35e-c372-420b-a314-065972a60cc6.jpg?v=1782940356","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a203551-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}