{"product_id":"carrier-py3gnaa60090aa-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V–24V for PY3GNAA60090AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V — HT01BD209 for Model PY3GNAA60090AA\u003c\/h1\u003e\u003cp\u003eThe Carrier HT01BD209 control transformer is the factory-specified OEM replacement for the \u003cstrong\u003eCarrier PY3GNAA60090AA\u003c\/strong\u003e packaged HVAC system. This transformer steps high-voltage line power (208\/240V) down to the 24V signal used by your thermostat, control board, contactor coil, and all other low-voltage components. When it fails, nothing in the control circuit responds — the system will appear completely dead even with line voltage present at the unit. A blown fuse on the secondary side is the most common symptom, often caused by a short in the low-voltage wiring.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA output | 208\/240V primary | 24V secondary | 50\/60Hz | OEM part number HT01BD209 | Replaces HT01BD207, HT01CN232, and 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers frequently underperform at rated VA load, causing nuisance low-voltage faults, premature contactor coil burnout, and control board instability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Always check for a short in the low-voltage circuit before powering up the replacement to avoid blowing the secondary fuse again.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. Orders placed before 3PM ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM fit for Carrier model \u003cstrong\u003ePY3GNAA60090AA\u003c\/strong\u003e. Verify your unit's data plate shows 208\/240V primary input and a 40VA, 24V secondary before ordering. Bryant and Payne units sharing this transformer platform are also covered. Our fitment team is available to confirm compatibility before you buy — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640445522291,"sku":"CARRIE-PY3GNAA60090AA-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640445555059,"sku":"CARRIE-PY3GNAA60090AA-TRANSFORMER-HT01BD209-GEN","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_b525222a-9766-4029-b138-88e0d8fcfe0e.jpg?v=1775025689","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa60090aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}