{"product_id":"carrier-py3gnaa48130aa-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V for PY3GNAA48130AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY3GNAA48130AA\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD209) is the factory-specified control voltage transformer for the \u003cstrong\u003eCarrier PY3GNAA48130AA\u003c\/strong\u003e packaged unit. Its job is to step down line voltage from 208\/240V to the 24V AC signal that powers your thermostat, control board, and every low-voltage relay in the system. When this transformer fails, the entire control circuit loses power — resulting in a blank thermostat display, a system that will not respond to any call for heating or cooling, or a tripped secondary fuse with no obvious cause. Replacing it with the correct OEM unit restores factory-rated output immediately.\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\/60Hz | OEM Part #: HT01BD209\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact factory VA tolerance, ensuring stable 24V output under full control-circuit load. Generic units often underperform at rated VA, causing intermittent lockouts or premature secondary fuse failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect power at the breaker and confirm zero voltage with a multimeter before touching any wiring. Note primary and secondary wire connections before removal. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Total job typically under 30 minutes for an experienced technician.\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-matched replacement for Carrier model \u003cstrong\u003ePY3GNAA48130AA\u003c\/strong\u003e. Always verify your unit's data plate voltage configuration (208V or 240V primary tap) matches before installation. Have a question about fitment? Our HVAC parts specialists verify compatibility before every order — contact us today and get your system back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640446439795,"sku":"CARRIE-PY3GNAA48130AA-TRANSFORMER-HT01BD209","price":55.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640446472563,"sku":"CARRIE-PY3GNAA48130AA-TRANSFORMER-HT01BD209-GEN","price":48.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_2803521c-1bb1-455c-908c-40f5e4fd922b.jpg?v=1775025572","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa48130aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}