{"product_id":"carrier-c50a503061-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A503061","description":"\u003ch1\u003eOEM Carrier Transformer 40VA 120V\/24V for Model C50A503061\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C50A503061\u003c\/strong\u003e commercial packaged unit. The transformer steps down line voltage from 120V to the 24V AC signal that powers your thermostat, control board, and all low-voltage switching circuits. When this component fails, the entire control circuit goes dark — your thermostat will be completely unresponsive, relays won't energize, and the system will not heat or cool regardless of thermostat commands.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V AC | Secondary: 24V AC | Factory-matched impedance and thermal protection | Fits Carrier OEM mounting footprint\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer is wound to exact VA and voltage specifications Carrier engineers designed for this unit. Undersized or off-tolerance generic transformers can overheat, trip the internal fuse, or cause erratic low-voltage behavior that mimics control board failure — leading to costly misdiagnosis.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: multimeter, flathead and Phillips screwdrivers, wire stripper, needle-nose pliers. Always verify 24V output at secondary terminals after installation before restoring control wiring.\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 for the Carrier \u003cstrong\u003eC50A503061\u003c\/strong\u003e commercial rooftop\/packaged unit. Confirm your existing transformer's VA rating and primary voltage on the unit data plate or wiring schematic before ordering. If your thermostat display is blank and your control board shows no activity, test transformer secondary output first — this is the most common and most overlooked fix. Questions about fitment? Our HVAC parts specialists verify compatibility before you order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909672554867,"sku":"CARRIE-C50A503061-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909672587635,"sku":"CARRIE-C50A503061-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_6ec914d5-de15-4921-b8f6-9d2436239dc7.jpg?v=1782940597","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a503061-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}