{"product_id":"carrier-py3gna024040ab-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY3GNA024040AB","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY3GNA024040AB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier replacement transformer (part #HT01BD209) factory-specified for the \u003cstrong\u003eCarrier PY3GNA024040AB\u003c\/strong\u003e HVAC system. The control transformer steps down high-voltage line power (208\/240V) to the 24V AC signal that energizes the entire low-voltage control circuit — including the thermostat, contactor coil, gas valve, and control board. When this transformer fails, the result is total system lockout: the thermostat goes blank, the unit will not respond to any calls for heating or cooling, and no control components receive power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 208\/240V | Output 24V | 40VA power rating | 50\/60Hz dual-frequency | OEM part number HT01BD209 | Factory-matched for Carrier PY3GNA024040AB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a factory OEM unit built to Carrier's exact VA rating and insulation class. Generic transformers often carry loose VA tolerances that can overheat under normal control circuit loads, leading to premature burnout and repeat failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (to verify 24V output after install). Photograph all wiring connections before disconnecting the old unit. Match wire-for-wire on reinstall.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer 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 PY3GNA024040AB\u003c\/strong\u003e. Verify your unit's data plate voltage ratings before ordering. Not sure if this is the right part? Contact our HVAC parts team — we verify fitment before you buy. Order today and get same-day shipping straight to your door.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640489464179,"sku":"CARRIE-PY3GNA024040AB-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640489496947,"sku":"CARRIE-PY3GNA024040AB-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_ed5bc0cd-8274-483f-ab2a-da9182799a10.jpg?v=1782942335","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna024040ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}