{"product_id":"carrier-py1pjb048130nbaa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY1PJB048130NBAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V — HT01BD209 for Model PY1PJB048130NBAA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier control transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY1PJB048130NBAA\u003c\/strong\u003e packaged unit. The transformer steps down line voltage (208\/240V) to the 24V AC signal that powers the entire control circuit — including the thermostat, relay coils, and safety switches. When this transformer fails, \u003cem\u003enothing works\u003c\/em\u003e: the thermostat goes dark, the system will not respond to calls for heating or cooling, and a multimeter will show no 24V secondary output. It is one of the first components a technician should check during a complete no-response diagnostic.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input: 208\/240V | Output: 24V AC | Power Rating: 40VA | Frequency: 50\/60 Hz | OEM Part #: HT01BD209\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM transformer, manufactured to exact factory voltage and VA tolerances. Generic transformers may run outside ±5% tolerance, causing nuisance tripping of downstream controls or premature board failure. OEM is always the safer choice for control circuit components.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the breaker and confirm zero voltage before disconnecting any wires. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Label or photograph all wire connections before removal. Replacement typically takes 20–30 minutes for a qualified technician.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. In stock and ships same business day from our warehouse. Backed by our NationalHVACParts.com fitment guarantee.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed for the Carrier \u003cstrong\u003ePY1PJB048130NBAA\u003c\/strong\u003e packaged unit. Verify your unit's data plate input voltage (208\/240V) and confirm the 40VA transformer specification before ordering. Not sure it fits? Contact our parts team — we verify fitment before you buy and ship same day so your system is back up fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641009262963,"sku":"CARRIE-PY1PJB048130NBAA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641009295731,"sku":"CARRIE-PY1PJB048130NBAA-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_c1bf76b7-0a30-4e9d-9fc3-96cb0999af4f.jpg?v=1782942249","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1pjb048130nbaa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}