{"product_id":"carrier-py3ppa036090ab-transformer-h30291","title":"OEM Carrier Transformer 208\/240V–24V 40VA for PY3PPA036090AB","description":"\u003ch1\u003eOEM Carrier Control Transformer 208\/240V to 24V 40VA — HT01BD209 for Model PY3PPA036090AB\u003c\/h1\u003e\u003cp\u003eThe Carrier \u003cstrong\u003eHT01BD209\u003c\/strong\u003e is the factory OEM control transformer for the \u003cstrong\u003ePY3PPA036090AB\u003c\/strong\u003e packaged unit. This transformer steps down the 208\/240V line-side supply voltage to the 24V AC signal that powers your thermostat, control board, contactors, and all low-voltage safety circuits. When this transformer fails — due to a shorted control wire, a failed board drawing excess current, or simple age — the entire low-voltage control circuit goes dead: the thermostat goes blank, the system won't respond to any call for heating or cooling, and in many cases the system appears completely non-functional even though the main power supply is intact.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Input (Primary) Voltage: 208\/240V | Output (Secondary) Voltage: 24V | Frequency: 50\/60 Hz | Power Rating: 40VA | OEM Part Number: HT01BD209\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 replacements can run under-rated VA, causing nuisance tripping, overheating, and premature failure of the control board it's meant to protect.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Shut off all power at the breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output after install), wire stripper. Label or photograph all low-voltage wiring before disconnecting. Always check for a shorted low-voltage wire before installing a new transformer — the short that killed the original will destroy a new one immediately.\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 Directly fits Carrier model \u003cstrong\u003ePY3PPA036090AB\u003c\/strong\u003e. The HT01BD209 is also a direct OEM replacement for superseded part number HT01CN232. Verify your unit's data plate input voltage before ordering. Our fitment team is available to confirm compatibility before you buy — order with confidence today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640360948083,"sku":"CARRIE-PY3PPA036090AB-TRANSFORMER-HT01BD209","price":55.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640360980851,"sku":"CARRIE-PY3PPA036090AB-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_2b7287e9-1982-413a-93bf-f99d59e217cb.jpg?v=1775041203","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3ppa036090ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}