{"product_id":"carrier-c50a202561-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A202561","description":"\u003ch1\u003eOEM Carrier Control Circuit Transformer 40VA for Model C50A202561\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier C50A202561\u003c\/strong\u003e packaged unit. The transformer converts 120V line voltage down to the 24V control circuit voltage required to power your thermostat, control board, contactor coil, and all low-voltage system components. When this transformer fails, the entire control circuit goes dead — the thermostat display goes blank, the system will not respond to any calls for heating or cooling, and nothing appears to work even though line voltage is present at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched output voltage for stable control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This factory OEM transformer is wound to exact Carrier specifications, ensuring stable 24V output under full VA load. Generic transformers often deliver inconsistent secondary voltage, causing nuisance lockouts, erratic thermostat behavior, and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify zero voltage with a multimeter before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all low-voltage wire connections before removing the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In-stock units ship 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 \u003cstrong\u003eCarrier C50A202561\u003c\/strong\u003e commercial rooftop\/packaged unit. Always verify transformer VA rating and primary\/secondary voltages against your unit's wiring diagram before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get back up and running today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909716726131,"sku":"CARRIE-C50A202561-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909716758899,"sku":"CARRIE-C50A202561-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_c316a049-5ff1-4858-b416-d63b90f20232.jpg?v=1782940328","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a202561-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}