{"product_id":"carrier-subclr50hj402464-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for SUBCLR50HJ402464","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V — HT01BD209 for Model SUBCLR50HJ402464\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part# \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier SUBCLR50HJ402464\u003c\/strong\u003e HVAC system. The transformer steps down the 208\/240V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and every other low-voltage component in the system. When this part fails, the entire control circuit goes dark — symptoms include a completely blank thermostat display, no response to any call for heat or cooling, and a system that won't energize even when the breaker is confirmed good. If the system is completely unresponsive and line voltage is present at the unit, 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 rating | Primary: 208\/240V | Secondary: 24V | 50\/60Hz dual-frequency | OEM part# HT01BD209 | Replaces HT01BD207, HT01CN232, 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer, manufactured to exact factory VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers can trip thermal overloads, cause nuisance lockouts, or damage the control board — OEM ensures plug-and-play reliability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off power at the breaker AND the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to confirm 0V before touching wires). Photograph existing wire routing before disconnecting. Mount style and wire leads match the OEM unit for a direct swap.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty included. Ships same business day from our warehouse — order by 3PM local time for same-day dispatch.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003eSUBCLR50HJ402464\u003c\/strong\u003e HVAC system. Verify your unit's data plate matches a 208\/240V primary, 24V secondary, 40VA requirement before ordering. Cross-references: HT01BD207, HT01CN232, 9076-00. Not sure it's the right part? Contact our fitment team before you order — we verify compatibility at no charge.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640291381619,"sku":"CARRIE-SUBCLR50HJ402464-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640291414387,"sku":"CARRIE-SUBCLR50HJ402464-TRANSFORMER-HT01BD209-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-HT01BD209_f628e2c2-bbd7-4524-831d-bc6ba8818ace.jpg?v=1782942451","url":"https:\/\/nationalhvacparts.com\/products\/carrier-subclr50hj402464-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}