{"product_id":"carrier-py2ppb030040aa-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/240V–24V for PY2PPB030040AA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V — HT01BD209 for Model PY2PPB030040AA\u003c\/h1\u003e\u003cp\u003eThe \u003cstrong\u003eCarrier HT01BD209\u003c\/strong\u003e is the factory OEM control transformer for the \u003cstrong\u003ePY2PPB030040AA\u003c\/strong\u003e packaged unit. Its job is critical and simple: step down 208\/240V line voltage to the 24V signal voltage that powers your thermostat, control board, contactor coil, and every other low-voltage component in the system. When this transformer fails, the entire control circuit goes dark — the thermostat displays nothing, the system won't call for heating or cooling, and no components respond at all. A failed transformer is often misdiagnosed as a bad thermostat or control board; always test transformer output voltage first.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input 208\/240V AC | Output 24V AC | Power Rating 40VA | Frequency 50\/60Hz | OEM Part # HT01BD209 | Replaces HT01CN232\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier factory part, wound to exact VA tolerances. Generic transformers frequently run hot under full load and can damage downstream 24V components — particularly sensitive control boards — if their output voltage drifts.\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 starting. Tools needed: multimeter, flathead and Phillips screwdrivers, wire stripper, electrical tape. Photograph all wiring connections before disconnecting. Confirm 24V output with a multimeter after installation before restoring full power.\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 the Carrier \u003cstrong\u003ePY2PPB030040AA\u003c\/strong\u003e packaged unit. This transformer also fits a broad range of Carrier, Bryant, and Payne residential and commercial HVAC systems requiring a 208\/240V-primary, 24V-secondary, 40VA control transformer — verify your unit's data plate before ordering. Need fitment confirmation? Our HVAC parts specialists verify compatibility before you buy.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640526000499,"sku":"CARRIE-PY2PPB030040AA-TRANSFORMER-HT01BD209","price":55.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640526033267,"sku":"CARRIE-PY2PPB030040AA-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_8b9af6f9-2c53-4297-90b9-e3bb04f2d51e.jpg?v=1775025644","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2ppb030040aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}