{"product_id":"carrier-c4850c50ay06051-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Control Transformer for C4850C50AY06051 | National HVAC Parts","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C4850C50AY06051\u003c\/h1\u003e\u003cp\u003eThis is the OEM factory-specified control transformer (part# \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) for the \u003cstrong\u003eCarrier C4850C50AY06051\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this transformer fails, absolutely nothing in the control circuit responds — the thermostat goes blank, the system won't call for heating or cooling, and you may find a blown fuse on the control board. It is one of the first components to check when a unit is completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM Part# HT01BD236 | Factory-matched for Carrier C4850C50AY06051 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances required by the Carrier control board. Undersized or off-tolerance generic units can overheat, blow fuses repeatedly, or deliver insufficient voltage to actuate contactors reliably.\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, multimeter, wire nuts or spade terminals. Always verify 24V output on the secondary after installation before restoring full power.\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 and factory-specified for the Carrier \u003cstrong\u003eC4850C50AY06051\u003c\/strong\u003e packaged unit. Always confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Our HVAC parts specialists are available to verify fitment — reach out before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909807853939,"sku":"CARRIE-C4850C50AY06051-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909807886707,"sku":"CARRIE-C4850C50AY06051-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_e509653f-ddea-43a9-9ab6-3eaae985b350.jpg?v=1782899141","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c4850c50ay06051-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}