{"product_id":"carrier-py1pjb048090abaa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY1PJB048090ABAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY1PJB048090ABAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD209) is the factory-specified 40VA step-down transformer for the \u003cstrong\u003eCarrier PY1PJB048090ABAA\u003c\/strong\u003e packaged unit. The transformer converts the 208\/240V line voltage down to the 24V signal required by the thermostat, control board, contactor coil, and all low-voltage safety circuits. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system will not respond to any call for heating or cooling, and no contactor or safety relay will energize. A failed transformer is often misdiagnosed as a bad control board; always test transformer output voltage first before replacing higher-cost components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/240V primary input | 24V secondary output | 40VA power rating | 50\/60 Hz | OEM part number HT01BD209 | Factory-matched winding tolerances\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerance specs for this unit. Undersized or off-tolerance aftermarket transformers can overload, trip thermal protection, or shorten contactor coil life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter (to verify 24V output after installation). Photograph existing wiring before disconnecting any leads.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for Carrier model \u003cstrong\u003ePY1PJB048090ABAA\u003c\/strong\u003e. Verify your unit's data plate shows a 208\/240V primary and 24V secondary control circuit before ordering. Not sure it fits? Our HVAC parts specialists verify fitment before every order — contact us today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641015095667,"sku":"CARRIE-PY1PJB048090ABAA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641015128435,"sku":"CARRIE-PY1PJB048090ABAA-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_22d3d238-5a78-4eba-855e-a23b829a469f.jpg?v=1782942240","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1pjb048090abaa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}