{"product_id":"carrier-c4850c50ay03061-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AY03061 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50AY03061\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier C4850C50AY03061\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V AC signal that powers your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system will not stage heating or cooling, and you may find a blown 3A fuse on the control board as a secondary symptom. Replacing the transformer is one of the most cost-effective repairs in the system.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | Primary: 120V AC | Secondary: 24V AC | OEM part number HT01BD236 | Factory-matched winding insulation class\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD236 transformer meets Carrier's exact VA rating and insulation class. Undersized or off-brand transformers are prone to thermal overload when multiple low-voltage accessories (humidifiers, zoning boards, UV lights) share the circuit, leading to premature failure and potential control board damage.\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 starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 24V output after installation before restoring full system power. Photograph all wiring connections before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. 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\u003eC4850C50AY03061\u003c\/strong\u003e packaged unit. Always verify the 40VA rating and primary\/secondary voltages against your unit's wiring diagram before ordering — VA rating must match or exceed the original to avoid overload. Our fitment specialists are available to confirm compatibility before you purchase. Order today and enjoy same-day shipping on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909812113779,"sku":"CARRIE-C4850C50AY03061-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909812146547,"sku":"CARRIE-C4850C50AY03061-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_1e58e68d-8379-4e3d-90c6-3953a46bf904.jpg?v=1782938952","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ay03061-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}