{"product_id":"carrier-c50a203552-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A203552","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C50A203552\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A203552\u003c\/strong\u003e commercial packaged unit. The transformer steps down 120V line voltage to the 24V control circuit voltage that powers your thermostat, contactor coil, gas valve, and all low-voltage control components. When this transformer fails, the entire control circuit goes dead — the thermostat loses power, the system won't respond to any call for heating or cooling, and nothing works. If you're measuring 0V at the R and C thermostat terminals with line voltage confirmed at the unit, this transformer is the most likely culprit.\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 output tolerance for reliable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM Carrier transformer is wound to exact factory VA and voltage specifications. Generic transformers may run under-rated VA, causing premature failure under the full control circuit load — especially on units with multiple low-voltage accessories or communicating thermostats.\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, wire stripper, multimeter. Always verify 0V at primary terminals before handling. Label all low-voltage wiring before disconnecting from secondary terminals.\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 Designed as the direct OEM replacement for \u003cstrong\u003eCarrier C50A203552\u003c\/strong\u003e commercial packaged units. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate before ordering. Our parts specialists are available to confirm fitment — order with confidence from NationalHVACParts.com and get same-day shipping on in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909713154419,"sku":"CARRIE-C50A203552-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909713187187,"sku":"CARRIE-C50A203552-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_0608dc36-40e7-4cdd-8edf-64c32b0fbb64.jpg?v=1782940358","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a203552-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}