{"product_id":"carrier-09de044900-transformer-h2ut4z","title":"OEM Carrier Transformer 40VA 230\/115V 24V Sec — 09DE044900","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BC208 for Model 09DE044900\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BC208\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier 09DE044900\u003c\/strong\u003e. The transformer steps down high-voltage line power — either 230V or 115V primary — to the 24V AC signal that energizes the entire low-voltage control circuit: thermostat, contactor coil, gas valve, and board logic. When this transformer fails, the entire system goes dark — no thermostat response, no staging, no operation whatsoever. It is often the first component to diagnose when a unit shows zero control activity despite confirmed line voltage.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA output | Dual primary: 230V \/ 115V | 24V secondary | 60 Hz | Part No. HT01BC208 | Cross-ref: 320659-301, 2-05757-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA ratings and insulation class. Undersized or off-spec generic units can overheat under full control load, tripping thermal cutoffs and causing intermittent faults that are difficult to diagnose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power and confirm zero voltage before disconnecting wires. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all wire connections before removal. Verify primary tap selection (230V vs 115V) matches your unit's supply voltage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for \u003cstrong\u003eCarrier model 09DE044900\u003c\/strong\u003e. Confirm your unit's supply voltage matches the correct primary tap (230V or 115V) before installation. Cross-references: 320659-301, 2-05757-1. Not sure it fits? Our fitment team verifies compatibility before you order — reach out before purchasing.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640132489587,"sku":"CARRIE-09DE044900-TRANSFORMER-HT01BC208","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640132522355,"sku":"CARRIE-09DE044900-TRANSFORMER-HT01BC208-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-HT01BC208_00186da2-f685-481b-b96a-feb4534f3135.jpg?v=1782942466","url":"https:\/\/nationalhvacparts.com\/products\/carrier-09de044900-transformer-h2ut4z","provider":"National HVAC Parts","version":"1.0","type":"link"}