{"product_id":"carrier-c48a404062-transformer-h302a1","title":"OEM Carrier 40VA 120V to 24V Transformer for C48A404062 — Ships Today","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer for Model C48A404062\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier C48A404062\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal that powers your thermostat, contactor coil, and all low-voltage control circuits. When this component fails, nothing in the system responds — no thermostat display, no fan, no compressor — because the entire control circuit loses power. If your unit is completely unresponsive and your breaker is not tripped, a failed transformer is one of the first components to test.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rated | 120V primary \/ 24V secondary | OEM part numbers HT01BD236 and HT01BD702 | Factory-matched output tolerance for reliable low-voltage control\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and potted to Carrier's exact VA rating and insulation class, ensuring consistent 24V output under load. Generic units can sag under peak demand, causing intermittent control failures and nuisance lockouts.\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, needle-nose pliers, multimeter. Verify 24V output across secondary terminals after installation before restoring full power. Label or photograph all low-voltage wiring before disconnecting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before cutoff ship 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 C48A404062\u003c\/strong\u003e packaged unit. Cross-references OEM part numbers \u003cstrong\u003eHT01BD236\u003c\/strong\u003e and \u003cstrong\u003eHT01BD702\u003c\/strong\u003e. Always confirm your unit's control board accepts a 40VA 24V secondary transformer by checking the data plate or wiring diagram inside the access panel before ordering. Our fitment team is available to verify compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62909739630963,"sku":"CARRIE-C48A404062-TRANSFORMER-HT01BD236","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62909739663731,"sku":"CARRIE-C48A404062-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_ebe1c82f-3f43-40a2-b736-563a17358804.jpg?v=1782899451","url":"https:\/\/nationalhvacparts.com\/products\/carrier-c48a404062-transformer-h302a1","provider":"National HVAC Parts","version":"1.0","type":"link"}