{"product_id":"carrier-c48a503562-transformer-h302a1","title":"OEM Carrier Transformer 40VA 24V for C48A503562 — HT01BD236","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C48A503562\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A503562\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (120V) to the 24V signal required by your thermostat, contactor coil, and all low-voltage control circuitry. When this component fails, absolutely nothing in the control system responds — the thermostat goes dark, the unit refuses to start, and no call for heating or cooling is ever received. It is one of the first components to check when a system appears completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | Class 2 transformer | OEM part numbers HT01BD236 and HT01BD702 — direct factory replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for Carrier packaged equipment. Undersized or off-tolerance generic transformers can overheat, trip internal fuses repeatedly, or fail to sustain 24V under full contactor load — causing nuisance lockouts and premature board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Verify 0V at primary terminals before handling. Note wire colors and terminal positions before disconnecting the old unit.\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\u003eC48A503562\u003c\/strong\u003e packaged unit. Verify your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Replaces OEM part numbers \u003cstrong\u003eHT01BD236\u003c\/strong\u003e and \u003cstrong\u003eHT01BD702\u003c\/strong\u003e. Not sure this is the right part? Our HVAC parts specialists verify fitment before you order — reach out before purchasing.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909732028787,"sku":"CARRIE-C48A503562-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909732061555,"sku":"CARRIE-C48A503562-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_ed8b0360-56cc-4941-832f-4e9594485e61.jpg?v=1782942517","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a503562-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}