{"product_id":"carrier-py3gnaa36090na-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V–24V — PY3GNAA36090NA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY3GNAA36090NA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNAA36090NA\u003c\/strong\u003e. The transformer steps down line voltage (208\/240V) to the 24V signal that powers your thermostat, control board, and all low-voltage system components. When it fails, the entire control circuit goes dark — the thermostat becomes unresponsive, the system won't call for heating or cooling, and no fault codes will appear because the board itself has lost power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input Voltage: 208\/240V | Output Voltage: 24V | Power Rating: 40VA | Frequency: 50\/60 Hz | Factory OEM part number HT01BD209 | Also replaces legacy part HT01CN232\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers can sag under load, causing nuisance lockouts, board resets, and premature contactor wear throughout the control circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker and disconnect switch before servicing. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all 24V wiring before removing the old transformer. Verify output voltage at 24V terminals before reconnecting the control board.\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 Designed as the direct OEM replacement for \u003cstrong\u003eCarrier model PY3GNAA36090NA\u003c\/strong\u003e. Cross-references legacy Carrier part number HT01CN232. Verify input voltage on your unit's data plate (208V or 240V) before ordering — this transformer is rated for both. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640452927859,"sku":"CARRIE-PY3GNAA36090NA-TRANSFORMER-HT01BD209","price":55.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640452960627,"sku":"CARRIE-PY3GNAA36090NA-TRANSFORMER-HT01BD209-GEN","price":48.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_9d554eb1-1a12-4cd9-8a7b-5227c7e466e7.jpg?v=1775025786","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa36090na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}