{"product_id":"carrier-subclr50hj440684-transformer-h30291","title":"OEM Carrier 40VA Transformer 120V–24V for SUBCLR50HJ440684","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 120V–24V for Model SUBCLR50HJ440684\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eSUBCLR50HJ440684\u003c\/strong\u003e unit. The transformer steps down 120V line voltage to the 24V control circuit voltage that powers your thermostat, contactor coils, and all low-voltage safety controls. When this component fails, the entire control circuit loses power — symptoms include a completely unresponsive thermostat, a system that won't turn on at all, or tripped low-voltage fuses with no apparent cause.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | Primary: 120V | Secondary: 24V | OEM part number HT01BD209 | Factory-matched for SUBCLR50HJ440684\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM transformer is wound and rated to exact Carrier factory tolerances, ensuring stable 24V output under full control-circuit load. Off-brand transformers often under-deliver VA capacity, causing nuisance lockouts and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label and photograph all low-voltage wiring before disconnecting. Verify 24V output at secondary terminals after installation before restoring full system power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our stocked warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for Carrier model \u003cstrong\u003eSUBCLR50HJ440684\u003c\/strong\u003e. Always verify your unit's data plate voltage and VA requirements before ordering. Our HVAC parts specialists are available to confirm fitment — reach out before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640288334195,"sku":"CARRIE-SUBCLR50HJ440684-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640288366963,"sku":"CARRIE-SUBCLR50HJ440684-TRANSFORMER-HT01BD209-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_cb742d66-a513-4802-a540-eb90ebf5ddfa.jpg?v=1775016373","url":"https:\/\/nationalhvacparts.com\/products\/carrier-subclr50hj440684-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}