{"product_id":"carrier-py3gna024040na-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V–24V for PY3GNA024040NA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY3GNA024040NA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNA024040NA\u003c\/strong\u003e HVAC system. The transformer steps down line voltage (208\/240V) to the 24V signal that powers your thermostat, control board, and every low-voltage safety circuit in the unit. When this component fails, the entire control circuit goes dark — the result is a completely unresponsive system: a blank thermostat, no heating or cooling response, or a hard system lockout with no error codes.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | Primary: 208\/240V, 50\/60Hz | Secondary: 24V | Direct OEM replacement for HT01BD209 | Also replaces 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 VA and voltage tolerances required by the Carrier control board. Undersized or off-tolerance generic units can cause intermittent resets, nuisance trips on low-voltage safeties, or premature control board failure — choose OEM for a guaranteed fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all wires or photograph connections before disconnecting the old transformer. Verify 24V output with a multimeter before reassembling panels.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty included. 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 for the \u003cstrong\u003eCarrier PY3GNA024040NA\u003c\/strong\u003e HVAC system. This transformer is also a verified cross-reference for systems originally specifying HT01BD207, HT01CN232, or 9076-00. Always confirm primary voltage (208V or 240V) matches your unit's data plate before ordering. Our technical team is available to verify fitment prior to purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640488481139,"sku":"CARRIE-PY3GNA024040NA-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640488513907,"sku":"CARRIE-PY3GNA024040NA-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_09ed02f3-c534-4aee-adb4-1bc3f2548917.jpg?v=1775025664","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna024040na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}