{"product_id":"carrier-py3gna048115aa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY3GNA048115AA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD209 for Model PY3GNA048115AA\u003c\/h1\u003e\u003cp\u003eThe Carrier HT01BD209 is the factory-specified OEM control transformer for the \u003cstrong\u003eCarrier PY3GNA048115AA\u003c\/strong\u003e packaged unit. This transformer steps down the 208\/240V line voltage to the 24V AC signal that powers your thermostat, control board, gas valve, and every other low-voltage component in the system. When this transformer fails — due to a short in the control circuit, age, or overload — the result is complete system shutdown: the thermostat goes blank, the unit will not respond to any call for heating or cooling, and no low-voltage components operate.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/240V primary input | 24V secondary output | 40VA power rating | 50\/60Hz | OEM part number HT01BD209\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD209 is wound to Carrier's exact VA rating and insulation class, ensuring the secondary voltage holds steady under full control-circuit load. Generic transformers often underrate their true VA capacity, causing voltage sag that triggers nuisance lockouts and premature board failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Switch off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter (verify 0V before touching wires). Label or photograph all low-voltage wiring before disconnecting. Check for any short in the 24V circuit that may have caused the original failure before installing the new transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock and ships the same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Direct OEM replacement for \u003cstrong\u003eCarrier PY3GNA048115AA\u003c\/strong\u003e packaged units. Also replaces legacy Carrier part number HT01CN232. Verify your unit's model and data plate before ordering — our team is available to confirm fitment. Order today for same-day shipping and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640473407859,"sku":"CARRIE-PY3GNA048115AA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640473440627,"sku":"CARRIE-PY3GNA048115AA-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_565a3bdc-7445-41d1-8992-52e37fd6fd4d.jpg?v=1782942356","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gna048115aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}