{"product_id":"carrier-py2pnb030040ab-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V–24V for PY2PNB030040AB","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V — HT01BD209 for Model PY2PNB030040AB\u003c\/h1\u003e\u003cp\u003eThe \u003cstrong\u003eCarrier HT01BD209\u003c\/strong\u003e is the factory OEM control transformer for the \u003cstrong\u003eCarrier PY2PNB030040AB\u003c\/strong\u003e packaged unit. Its sole job is to step down high-voltage line power (208\/240V) to the 24V AC signal that drives every low-voltage component in your system — the thermostat, control board, contactor coil, and zone controls. When this transformer fails, the entire low-voltage control circuit goes dark: your thermostat goes blank, the system will not respond to any call for heating or cooling, and no fault codes appear because the board itself has no power. A failed transformer is often misdiagnosed as a control board failure, making correct identification critical before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/240V primary input | 24V secondary output | 50\/60 Hz rated | Replaces OEM part numbers HT01BD207, HT01CN232, and 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is a genuine Carrier OEM transformer wound to exact factory VA and voltage tolerances. Generic transformers frequently run under-spec VA ratings, causing premature burnout — especially on systems with multiple 24V zone valves or damper actuators on the same circuit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Turn off all power to the unit at the disconnect and breaker before touching any wiring. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Always confirm 0V at the primary terminals before handling. Label all wire connections before removal.\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 Direct factory replacement for Carrier model \u003cstrong\u003ePY2PNB030040AB\u003c\/strong\u003e packaged units. Cross-references: HT01BD207, HT01CN232, 9076-00, 4000A46E07AE28. Verify your existing transformer's primary voltage (208\/240V) and VA rating (40VA) on the data plate before ordering. Have questions about fitment? Our HVAC parts specialists verify compatibility before you order — contact us today and get your unit back online fast.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640546087283,"sku":"CARRIE-PY2PNB030040AB-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640546120051,"sku":"CARRIE-PY2PNB030040AB-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_729953b9-2e6f-4000-9abb-4f33ce1f6c35.jpg?v=1775025636","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2pnb030040ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}