{"product_id":"carrier-py4gnaa36060aa-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/240V–24V for PY4GNAA36060AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/240V to 24V — HT01BD209 for Model PY4GNAA36060AA\u003c\/h1\u003e\u003cp\u003eThe Carrier HT01BD209 is the factory OEM control transformer for the \u003cstrong\u003eCarrier PY4GNAA36060AA\u003c\/strong\u003e packaged HVAC unit. Its primary function is to step down high-voltage line power (208\/240V) to the 24V signal that energizes your thermostat, control board, contactor coil, and every low-voltage component in the system. When this transformer fails, the entire control circuit goes dead — the thermostat goes blank, the system refuses to respond to any command, and you may detect a faint burning smell or audible buzzing near the unit's control section. Replacing the transformer is almost always the most cost-effective fix before chasing a deeper electrical fault.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/240V primary input | 24V secondary output | 50\/60 Hz compatible | 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 factory tolerances. Generic aftermarket transformers often carry imprecise VA ratings and inferior insulation, raising the risk of nuisance tripping or secondary burnout from control-wiring shorts.\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: flathead and Phillips screwdrivers, wire stripper, multimeter (to confirm 0V before touching wiring). Label all wires before disconnecting the old unit. Verify 24VAC output with a multimeter after installation before restoring full power.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Shipping:\u003c\/strong\u003e Backed by a 1-year OEM manufacturer warranty against defects. In stock — ships same business day from our warehouse when ordered before cutoff.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Factory-specified replacement for the \u003cstrong\u003eCarrier PY4GNAA36060AA\u003c\/strong\u003e packaged HVAC unit. Also supersedes legacy Carrier part numbers HT01BD207, HT01CN232, and 9076-00. Always verify input voltage and VA rating on your unit's data plate before ordering. Our fitment team is available to confirm compatibility — reach out before you buy if you have any questions.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640332079475,"sku":"CARRIE-PY4GNAA36060AA-TRANSFORMER-HT01BD209","price":47.25,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640332112243,"sku":"CARRIE-PY4GNAA36060AA-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_a7922b1a-ea50-4c3b-93d7-b4029689167c.jpg?v=1782942446","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py4gnaa36060aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}