{"product_id":"carrier-c50a505052-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V\/24V for C50A505052 — HT01BD236","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C50A505052 — Part HT01BD236\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C50A505052\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When it fails, absolutely nothing responds: the thermostat goes dark, the system won't call for heating or cooling, and no components energize. It is often the first component to diagnose when a system appears completely unresponsive.\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 transformer is wound to Carrier's exact VA rating and insulation class. Generic transformers are frequently undersized, leading to voltage sag that causes intermittent lockouts, nuisance tripping, and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output post-install). Label or photograph all low-voltage wiring before disconnecting. Confirm fuse or breaker on secondary circuit is intact before condemning the transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Orders placed by 3PM local time ship same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC50A505052\u003c\/strong\u003e commercial packaged rooftop unit. Verify your existing transformer's VA rating, primary voltage, and secondary voltage on the unit data plate or wiring diagram before ordering. Cross-reference OEM part number HT01BD236 to confirm fitment. Need help verifying? Our HVAC parts specialists confirm compatibility before every order — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909668721011,"sku":"CARRIE-C50A505052-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909668753779,"sku":"CARRIE-C50A505052-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_200f8ea1-463b-40b2-b22c-93f88cbc5157.jpg?v=1782940634","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c50a505052-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}