{"product_id":"carrier-py2ppb042090nb-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY2PPB042090NB","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V for Model PY2PPB042090NB\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PY2PPB042090NB\u003c\/strong\u003e packaged unit. The transformer steps down 208\/240V line voltage to the 24V AC required by your thermostat, control board, contactor coil, and all low-voltage safety circuits. When this part fails, the entire control circuit goes dark — symptoms include a blank thermostat display, a system that won't respond to any call for heating or cooling, or tripped low-voltage fuses caused by an overloaded or shorted transformer winding.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/240V primary | 24V secondary | 50\/60Hz | OEM part number HT01BD209 | Also replaces HT01BD207, HT01CN232, and 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and impedance specs, protecting downstream boards and contactors from voltage sag under load. Generic units frequently run under-rated VA, causing nuisance trips and premature 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, wire stripper, multimeter. Label all low-voltage wiring before disconnecting. Confirm 24V output with a meter before restoring thermostat connections.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM manufacturer 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 OEM replacement for Carrier model \u003cstrong\u003ePY2PPB042090NB\u003c\/strong\u003e packaged heating and cooling units. Verify primary voltage (208V or 240V) on your unit's data plate before ordering. Not sure if this is your part? Our HVAC parts specialists verify fitment before you buy — reach out before placing your order.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640510402931,"sku":"CARRIE-PY2PPB042090NB-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640510435699,"sku":"CARRIE-PY2PPB042090NB-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_b4db8b24-d4c4-4f69-9e3d-4ef3672d09f0.jpg?v=1782942323","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2ppb042090nb-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}