{"product_id":"carrier-py1pjb048115nbaa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V-24V for PY1PJB048115NBAA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V — HT01BD209 for Model PY1PJB048115NBAA\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer for the \u003cstrong\u003eCarrier PY1PJB048115NBAA\u003c\/strong\u003e packaged unit. The transformer steps down the 208\/240V line voltage to the 24V signal required to power the thermostat, control board, and all low-voltage switching circuits. When this transformer fails — due to a shorted control wire, water intrusion, or age — nothing in the system responds: the thermostat goes blank, the unit won't energize, and no call for heating or cooling is processed. Replacing this transformer with the correct OEM part restores full low-voltage control circuit integrity.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input (Primary) Voltage: 208\/240V | Output (Secondary) Voltage: 24V | Power Rating: 40VA | Frequency: 50\/60 Hz | OEM Part Number: HT01BD209\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA capacity and insulation class for your unit. Generic transformers often use thinner windings and lower-grade core material, increasing the risk of early burnout — especially if a minor wiring fault causes momentary overload.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the disconnect before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Check for shorted thermostat wiring before installing the new transformer, or the replacement may fail immediately.\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 Designed for the Carrier \u003cstrong\u003ePY1PJB048115NBAA\u003c\/strong\u003e packaged unit. Verify your existing transformer's primary voltage, secondary voltage, and VA rating against your unit's data plate before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641012179315,"sku":"CARRIE-PY1PJB048115NBAA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641012212083,"sku":"CARRIE-PY1PJB048115NBAA-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_08034674-0708-4ce3-b1bc-625024d66b0b.jpg?v=1782942230","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1pjb048115nbaa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}