{"product_id":"carrier-py3gna036090na-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY3GNA036090NA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V for Model PY3GNA036090NA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNA036090NA\u003c\/strong\u003e packaged unit. The control transformer steps down 208\/240V line voltage to the 24V signal required to power your thermostat, control board, relays, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dark — no thermostat response, no ignition sequence, no fan operation. It is often the first component to suspect when a unit appears completely unresponsive despite confirmed line voltage at the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA power rating | 208\/240V primary input | 24V secondary output | 50\/60Hz rated | Direct OEM factory replacement for part #HT01BD209\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM Carrier transformers are wound to exact VA and voltage tolerance specifications. Undersized or off-spec aftermarket units can starve the control board or fail prematurely under full circuit load, causing intermittent lockouts and difficult-to-diagnose callbacks.\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: multimeter (verify 0V before touching leads), flathead and Phillips screwdrivers, wire nuts or terminals. Label all 24V secondary wires before disconnecting. Confirm output voltage after installation before restoring full system power.\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 Factory-matched for Carrier model \u003cstrong\u003ePY3GNA036090NA\u003c\/strong\u003e packaged unit. Verify your unit's data plate shows 208\/240V line voltage before ordering — units wired for 120V primary require a different transformer. Need help confirming fitment? Our HVAC parts specialists verify compatibility before you order. \u003cstrong\u003eOrder today for same-day shipping.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640479633779,"sku":"CARRIE-PY3GNA036090NA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640479666547,"sku":"CARRIE-PY3GNA036090NA-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_f9d1b45a-4671-43f4-bf3b-194954c56253.jpg?v=1782942340","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna036090na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}