{"product_id":"carrier-c48a404052-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Transformer for C48A404052 — Ships Today","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 120V\/24V for Model C48A404052\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD236\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A404052\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 120V to 24V to power the entire low-voltage control circuit — including the thermostat, contactor coil, and control board. When this part fails, the result is complete loss of control power: the thermostat goes blank, the system won't respond to any calls for heating or cooling, and nothing operates. It is one of the first components to check when a unit appears completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | OEM part number HT01BD236 | Factory-matched for Carrier C48A404052 packaged units\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA tolerances and insulated to factory specifications. Undersized or off-tolerance generic units can overheat under full control circuit load, blow fuses, or damage sensitive control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or spade connectors. Always confirm primary and secondary voltages with a meter before and after installation to protect downstream components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders received before cutoff ship same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eC48A404052\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. Our fitment team is available to confirm compatibility before you purchase — same-day shipping available on all in-stock OEM parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909739893107,"sku":"CARRIE-C48A404052-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909739925875,"sku":"CARRIE-C48A404052-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_12e98320-12cb-48ab-a0a3-c98ec2dd656c.jpg?v=1782899447","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a404052-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}