{"product_id":"carrier-py3pna048090nb-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/230V–24V — PY3PNA048090NB","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V to 24V for Model PY3PNA048090NB\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier control transformer (part #HT01BD209) factory-specified for the \u003cstrong\u003eCarrier PY3PNA048090NB\u003c\/strong\u003e packaged unit. The transformer steps down 208\/230V line voltage to the 24V DC signal that powers your thermostat, control board, contactors, and all low-voltage control wiring. When this component fails, the entire control circuit goes dead — your thermostat goes blank, the system won't respond to any call for heating or cooling, and nothing turns on. A failed transformer is one of the most common reasons an otherwise healthy HVAC system appears completely unresponsive.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/230V primary input | 24V secondary output | 50\/60 Hz rated | OEM part number HT01BD209 | Replaces HT01BD207, HT01CN232, 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD209 is factory-wound to exact impedance and VA tolerances for the PY3PNA048090NB. Generic alternatives may run slightly under-rated VA, causing the transformer to overheat under simultaneous thermostat + contactor + board load — leading to premature failure and blown fuses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and verify with a multimeter before touching any wiring. Photograph all wire connections before removal. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter. Check the 3A control-circuit fuse on the board before condemning the transformer — a shorted low-voltage device can blow both.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer warranty. Ships same business day from our warehouse when ordered by 3PM local time.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the factory-direct replacement for the \u003cstrong\u003eCarrier PY3PNA048090NB\u003c\/strong\u003e packaged unit. Also compatible with select Bryant and Payne models sharing the same 40VA 208\/230V transformer specification — verify your unit's data plate before ordering. Questions about fitment? Our HVAC parts specialists confirm compatibility before you buy. \u003cstrong\u003eOrder now — in stock and ships today.\u003c\/strong\u003e\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640380871027,"sku":"CARRIE-PY3PNA048090NB-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640380903795,"sku":"CARRIE-PY3PNA048090NB-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_6f593aa3-71ce-40b9-8960-c364c18310e1.jpg?v=1775025549","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3pna048090nb-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}