{"product_id":"carrier-py2pnb030040nb-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY2PNB030040NB","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V for Model PY2PNB030040NB\u003c\/h1\u003e\u003cp\u003eThis OEM Carrier transformer (part #HT01BD209) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY2PNB030040NB\u003c\/strong\u003e packaged unit. The transformer steps down 208\/240V line voltage to the 24V signal required by your thermostat, control board, contactor coil, and all low-voltage control circuits. When it fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any command, and no heating or cooling operation is possible. Replacing this transformer with the correct OEM part restores full system control immediately.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA power rating | 208\/240V primary input | 24V secondary output | 50\/60Hz | Factory-matched to Carrier PY2PNB030040NB wiring harness and mounting bracket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to Carrier's exact VA and voltage tolerances, ensuring the control board and contactor coil receive stable, clean 24V power. Generic units may run outside tolerance, causing nuisance lockouts, erratic thermostat behavior, or premature control board failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, wire stripper, multimeter. Label all low-voltage wires before disconnecting. Confirm input voltage at the transformer terminals before energizing.\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 \u003cstrong\u003eCarrier model PY2PNB030040NB\u003c\/strong\u003e packaged units. Verify your unit's data plate shows a 208\/240V control circuit before ordering. Not sure if this is the right part? Our HVAC parts specialists verify fitment before you buy — contact us today and we'll confirm compatibility fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640545431923,"sku":"CARRIE-PY2PNB030040NB-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640545464691,"sku":"CARRIE-PY2PNB030040NB-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_8afc672e-142e-4eb2-995b-ec79d210a4f1.jpg?v=1782942291","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb030040nb-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}