{"product_id":"carrier-c4850c50ak06051-transformer-h302a1","title":"OEM Carrier Transformer 40VA 120V to 24V for C4850C50AK06051 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD236 for Model C4850C50AK06051\u003c\/h1\u003e\u003cp\u003eThis OEM step-down transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C4850C50AK06051\u003c\/strong\u003e packaged unit. The transformer steps line voltage (120V) down to 24V AC to power the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this part fails, the result is total system silence: a blank thermostat, an unresponsive control board, and a unit that won't run in any mode. It is one of the most commonly overlooked parts during a no-power diagnostic.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary input | 24V AC secondary output | Class 2 control circuit transformer | OEM part number HT01BD236\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the factory OEM unit built to exact VA and voltage tolerances for the C4850C50AK06051. Generic transformers frequently use undersized windings that overheat under sustained thermostat demand, leading to premature failure and potential control board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after install). Label all low-voltage wires before disconnecting. Replace fuse on secondary circuit if blown.\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 \u003cstrong\u003eCarrier C4850C50AK06051\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary voltage on the unit data plate or existing component label before ordering. If your thermostat is blank and the unit breaker is confirmed on, this transformer is the first part to test with a multimeter. Order today and get same-day shipping — our fitment team is available to confirm compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909825384819,"sku":"CARRIE-C4850C50AK06051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909825417587,"sku":"CARRIE-C4850C50AK06051-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_f2a35ffe-edc9-485e-8d20-70c90fe458fa.jpg?v=1782938885","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ak06051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}