{"product_id":"carrier-py3gnaa60115na-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V–24V — PY3GNAA60115NA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY3GNAA60115NA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNAA60115NA\u003c\/strong\u003e HVAC system. The transformer steps down the 208\/240V line voltage to a safe 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, control board, and all safety switches. When this component fails, the result is typically a completely unresponsive system: blank thermostat display, no call for heat or cooling, and no blower operation. If your system is completely dead with line voltage confirmed at the unit, a failed transformer is the first component to test.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/240V primary input | 24V secondary output | 50\/60Hz compatible | Replaces obsolete P\/Ns HT01BD207, HT01CN232, and 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA and voltage tolerances, ensuring stable 24V output under full control-circuit load. Undersized or off-tolerance generic transformers can cause nuisance lockouts, intermittent control failures, and premature board damage.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power to the unit before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Photograph all low-voltage wiring connections before disconnecting. Verify 24V output at secondary terminals after installation before closing the cabinet.\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 Fits Carrier model \u003cstrong\u003ePY3GNAA60115NA\u003c\/strong\u003e. Verify primary voltage (208V or 240V) against your unit's data plate before ordering. This part also cross-references to HT01BD207, HT01CN232, and 9076-00 for multi-model applicability. Have a fitment question? Our HVAC parts specialists verify compatibility before you order — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640444244339,"sku":"CARRIE-PY3GNAA60115NA-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640444277107,"sku":"CARRIE-PY3GNAA60115NA-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_dbefd271-5ab9-4024-bca9-f0765aa43042.jpg?v=1775025794","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa60115na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}