{"product_id":"carrier-09de054900-transformer-h2ut4z","title":"OEM Carrier Transformer 40VA 230\/115V for Model 09DE054900","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 230\/115V for Model 09DE054900\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part number \u003cstrong\u003eHT01BC208\u003c\/strong\u003e) is the factory-specified replacement unit for Carrier model \u003cstrong\u003e09DE054900\u003c\/strong\u003e. The transformer steps down the primary supply voltage to the lower secondary voltage required to power the 24V control circuit — including the thermostat, contactor coil, and safety controls. When this transformer fails, the entire low-voltage control circuit goes dead: the thermostat display may go blank, the system will not respond to any calls for heating or cooling, and you may detect a burning smell or a tripped fuse on the secondary side. Replacing it with the correct OEM unit restores factory-specified voltage regulation and protects downstream components from damaging voltage fluctuations.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 230V primary \/ 115V secondary | 50\/60 Hz | OEM part number HT01BC208 | Also cross-references: 320659-301, 2-05757-1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Totaline\/Carrier OEM transformer wound and tested to exact factory tolerances. Aftermarket units often use undersized cores that overheat under continuous load, risking repeated fuse failures and premature board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, multimeter, wire nuts or quick-connects. Photograph all wiring connections before disconnecting leads. Verify secondary output (115V) with a multimeter before buttoning up the unit.\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 warehouse — order by 3PM local time to go out today.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Fits Carrier model \u003cstrong\u003e09DE054900\u003c\/strong\u003e. Always verify your unit's data plate primary and secondary voltage ratings match 230V\/115V and that the VA load of your control circuit does not exceed 40VA before ordering. Our HVAC parts specialists are available to confirm fitment — contact us before you order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640128983411,"sku":"CARRIE-09DE054900-TRANSFORMER-HT01BC208","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640129016179,"sku":"CARRIE-09DE054900-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_3ebb0a1f-1dfe-49d8-84ab-114a2e0e2b9a.jpg?v=1782942479","url":"https:\/\/nationalhvacparts.com\/products\/carrier-09de054900-transformer-h2ut4z","provider":"National HVAC Parts","version":"1.0","type":"link"}