{"product_id":"carrier-py1pjb048130aaaa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY1PJB048130AAAA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer 208\/240V to 24V — HT01BD209 for Model PY1PJB048130AAAA\u003c\/h1\u003e\u003cp\u003eThis is the genuine OEM Carrier replacement transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) factory-specified for the \u003cstrong\u003eCarrier PY1PJB048130AAAA\u003c\/strong\u003e packaged unit. The control transformer steps down the 208\/240V line voltage to a safe 24V AC signal that powers every low-voltage control circuit in your system — including the thermostat, contactor coils, and control board. When this transformer fails, the entire system goes dark: the thermostat loses power, the unit won't respond to any call for heating or cooling, and you may find a blown fuse on the control board. Replacing it with the correct OEM part restores factory-spec voltage regulation and protects downstream components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/240V primary input | 24V secondary output | 40VA power rating | 50\/60 Hz | Factory-matched to Carrier PY1PJB048130AAAA\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound and rated to exact Carrier factory tolerances, ensuring stable 24V output under full control-circuit load. Generic units often exhibit voltage sag under load, which can cause nuisance lockouts and premature contactor coil failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect and lock out power before beginning. Tools needed: multimeter, wire stripper, screwdriver set. Always verify secondary output voltage (should read 24–28V AC) after install before restoring system 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 Direct OEM replacement for Carrier model \u003cstrong\u003ePY1PJB048130AAAA\u003c\/strong\u003e packaged units. Verify your unit's data plate shows 208\/240V primary and 24V\/40VA control circuit before ordering. Not sure about fitment? Our HVAC parts specialists confirm compatibility before you buy — order today and get it shipped today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62641011032435,"sku":"CARRIE-PY1PJB048130AAAA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62641011065203,"sku":"CARRIE-PY1PJB048130AAAA-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_2b5af008-d745-46b0-bd15-bd1bef3aec84.jpg?v=1782942247","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py1pjb048130aaaa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}