{"product_id":"carrier-py3gna060090aa-transformer-h30291","title":"OEM Carrier 40VA Control Transformer for Furnace PY3GNA060090AA","description":"\u003cdiv class=\"product-content\"\u003e\n\u003ch1\u003eOEM Carrier 40VA Control Transformer for Furnace PY3GNA060090AA\u003c\/h1\u003e\n\u003cp\u003eThe control transformer is the heart of your Carrier furnace's low-voltage circuit, stepping the incoming 120V or 240V line power down to the 24V that runs your thermostat, gas valve, control board, and relays. When it fails, the entire low-voltage side goes dead: your thermostat screen goes blank, the furnace won't respond to a call for heat, and nothing happens when you turn up the temperature. A transformer that's shorting under load may hum loudly, run hot to the touch, emit a burnt-electrical smell, or repeatedly blow the board's low-voltage fuse the moment it's replaced.\n\nThis is a 40VA class 2 transformer with a 120\/240V dual primary and a 24V secondary, sized to handle the combined draw of the control board, inducer relay, gas valve, and a typical 24V thermostat without sagging. The 40VA rating provides the headroom Carrier engineered for this furnace platform; under-rated replacements droop voltage when the gas valve and inducer energize together.\n\nGenuine OEM matters here because the secondary voltage and VA capacity are matched to the furnace's actual load. Cheap aftermarket transformers are frequently under-rated or wound to looser specs, so they sag below 24V under full load — causing chattering relays, a gas valve that won't fully open, and intermittent ignition lockouts that are maddening to diagnose. The right transformer simply holds 24V solidly.\n\nInstallation difficulty: 2 of 5. Tools: 1\/4\" nut driver, multimeter, and needle-nose pliers. #1 safety warning: kill power at the breaker and the furnace disconnect switch before touching any wiring — the 120\/240V primary side is live and lethal. Label the leads before disconnecting.\n\nShips same business day from our stocked warehouse on orders placed before 3 PM CST. Backed by a 1-year OEM warranty and 30-day hassle-free returns on uninstalled parts.\u003c\/p\u003e\n\u003ch2\u003eCompatibility\u003c\/h2\u003e\n\u003cp\u003eThis part is compatible with Carrier model PY3GNA060090AA. Always verify the part number against your unit's data plate before ordering.\u003c\/p\u003e\n\u003ch2\u003eWhy Choose OEM?\u003c\/h2\u003e\n\u003cp\u003eOEM parts are manufactured to the exact factory specifications for your unit. Generic aftermarket alternatives may fit physically but often use lower-rated components that reduce equipment life and void manufacturer warranties. When the cost difference between OEM and generic is $10-30, the OEM part is always the smarter investment on a system worth $5,000-$15,000.\u003c\/p\u003e\n\u003ch2\u003eShipping \u0026amp; Returns\u003c\/h2\u003e\n\u003cp\u003eSame-day shipping on orders before 3 PM CST. Standard delivery 2-5 business days, express options available at checkout. 30-day hassle-free returns on uninstalled parts — free return shipping included. 1-year OEM factory warranty coverage.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640468885875,"sku":"CARRIE-PY3GNA060090AA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640468918643,"sku":"CARRIE-PY3GNA060090AA-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_28827ca2-f472-4224-86f9-6d733781fd07.jpg?v=1782899519","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna060090aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}