{"product_id":"carrier-py3gnaa48130na-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/230V–24V for PY3GNAA48130NA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V to 24V — Model PY3GNAA48130NA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM control transformer for the \u003cstrong\u003eCarrier PY3GNAA48130NA\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (208\/230V primary) to the 24V secondary signal that powers your thermostat, control board, and all low-voltage safety circuits. When this transformer fails, the entire control circuit goes dark — you'll see a blank thermostat display, no response to any system calls, or tripped fuses on the secondary side. It is one of the first components to check on any no-power, no-response service call.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V Primary | 24V Secondary | 40VA Rating | 50\/60 Hz | OEM Part# HT01BD209 | Also replaces HT01BD207, HT01CN232, 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Undersized or off-spec aftermarket units can starve control boards of voltage, causing nuisance lockouts and premature board failure — the OEM unit eliminates that risk entirely.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label and photograph all 24V wiring connections before disconnecting. Verify secondary output (24–28VAC) with a meter before reassembling the panel.\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-specified replacement transformer for Carrier model \u003cstrong\u003ePY3GNAA48130NA\u003c\/strong\u003e packaged units. Also a direct replacement for legacy OEM part numbers HT01BD207, HT01CN232, and 9076-00. Always confirm primary voltage on your unit's data plate matches 208\/230V before ordering. Our fitment team is available to verify compatibility before you buy — reach out before placing your order if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640446177651,"sku":"CARRIE-PY3GNAA48130NA-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640446210419,"sku":"CARRIE-PY3GNAA48130NA-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_b4336498-828f-4faf-b8b6-968871f60d6d.jpg?v=1775025506","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa48130na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}