{"product_id":"carrier-py3gnaa30060aa-transformer-h30291","title":"OEM Carrier Transformer 40VA 120V-24V for PY3GNAA30060AA","description":"\u003ch1\u003eOEM Carrier Control Transformer HT01BD209 for Model PY3GNAA30060AA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GNAA30060AA\u003c\/strong\u003e system. The transformer steps down line voltage (120V) to the 24V signal voltage required by the control board, thermostat, and all low-voltage safety circuits. When this component fails, the entire control circuit goes dead — the thermostat becomes unresponsive, contactors won't energize, and the system refuses to start. A blown transformer is often mistaken for a failed control board, so always verify transformer output with a multimeter before replacing more expensive components.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA rating | 120V primary \/ 24V secondary | Factory-matched OEM tolerances | Plug-and-play wiring harness connector\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is an authentic OEM Carrier part (HT01BD209), wound to exact factory VA and voltage specifications. Generic transformers with undersized VA ratings are prone to overheating under normal HVAC control loads, risking secondary component damage and nuisance tripping of thermal fuses.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Always shut off power at the disconnect and breaker before beginning. Tools needed: flathead and Phillips screwdrivers, multimeter, wire stripper. Photograph all wiring connections before disconnecting the old transformer. Verify 24V output at secondary terminals before reassembling the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects. Ships same business day from our climate-controlled warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Designed specifically for the \u003cstrong\u003eCarrier PY3GNAA30060AA\u003c\/strong\u003e. Always confirm your existing transformer's VA rating and primary\/secondary voltages on the unit data plate or wiring diagram before ordering. Need help verifying fitment? Our HVAC parts specialists confirm compatibility before you buy — no guesswork.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640458858867,"sku":"CARRIE-PY3GNAA30060AA-TRANSFORMER-HT01BD209","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640458891635,"sku":"CARRIE-PY3GNAA30060AA-TRANSFORMER-HT01BD209-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_3dc5192a-170e-4c1b-a819-4a17de271740.jpg?v=1775041291","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gnaa30060aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}