{"product_id":"carrier-py2ppb030040ab-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V HT01BD209 — PY2PPB030040AB","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD209 for Model PY2PPB030040AB\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY2PPB030040AB\u003c\/strong\u003e packaged unit. The transformer steps down 208\/240V line voltage to a stable 24V AC output, powering the low-voltage control circuit that drives your thermostat, contactor coil, control board, and all system safeties. When this transformer fails — typically from a short circuit, voltage spike, or age-related winding failure — the entire control circuit goes dead: the thermostat goes blank, the system won't respond to any call for heating or cooling, and the unit sits completely unresponsive. Replacing the transformer is the first diagnostic step when all low-voltage control is lost.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA power rating | Input: 208\/240V AC, 50\/60 Hz | Output: 24V AC | OEM part number HT01BD209 | Direct factory replacement\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e The OEM HT01BD209 is wound to exact Carrier factory tolerances, ensuring stable 24V output under full load. Generic transformers can drift in output voltage, causing nuisance lockouts, failed contactor pull-ins, and premature control board wear.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off main power before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install), wire strippers. Photograph existing wire connections before disconnecting. Confirm primary tap matches your supply voltage (208V or 240V).\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty. In stock — 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\u003ePY2PPB030040AB\u003c\/strong\u003e packaged unit. Also fits other Carrier, Bryant, and Payne models requiring a 208\/240V-to-24V 40VA control transformer — verify your unit's data plate voltage and VA rating before ordering. Have a fitment question? Our HVAC parts specialists confirm compatibility before you buy. Order today and get same-day shipping.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640525082995,"sku":"CARRIE-PY2PPB030040AB-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640525115763,"sku":"CARRIE-PY2PPB030040AB-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_d446754d-9969-453f-9dae-40f6dcad2f5d.jpg?v=1782942461","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py2ppb030040ab-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}