{"product_id":"carrier-py2pnb024040ac-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY2PNB024040AC","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD209 for Model PY2PNB024040AC\u003c\/h1\u003e\u003cp\u003eThis is the factory OEM replacement control transformer for the \u003cstrong\u003eCarrier PY2PNB024040AC\u003c\/strong\u003e HVAC system. The transformer steps down 208\/240V line voltage 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 goes dead — your thermostat goes blank, the system won't respond to any call for heating or cooling, and you may measure zero voltage at the 24V terminals on the board. Replacing it with the correct OEM part restores factory-spec power delivery instantly.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e OEM Part # HT01BD209 | Input: 208\/240V | Output: 24V | 40VA power rating | 50\/60 Hz | Factory-matched for Carrier PY2PNB024040AC\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and potted to Carrier's exact VA and impedance spec. Off-brand units may sag under load, causing intermittent board resets, erratic thermostat behavior, or premature contactor failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the breaker and verify zero voltage with a multimeter before touching any terminals. Tools needed: flathead and Phillips screwdrivers, multimeter, wire labels or tape. Document all 24V wiring connections before disconnecting the old transformer.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. In-stock and ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as the direct OEM replacement for \u003cstrong\u003eCarrier model PY2PNB024040AC\u003c\/strong\u003e. Always verify input voltage on your unit's data plate before ordering — 208\/240V input required. Not compatible with 120V primary applications. Our fitment team is available to confirm compatibility before you order. Order now and get same-day shipping on all in-stock parts.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640555983219,"sku":"CARRIE-PY2PNB024040AC-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640556015987,"sku":"CARRIE-PY2PNB024040AC-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_ab6db203-a303-4d4b-a0ff-c5595c0bfc4b.jpg?v=1782942281","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb024040ac-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}