{"product_id":"carrier-py4gpaa48130aa-transformer-h30291","title":"OEM Carrier Control Transformer 40VA 208\/230V–24V for PY4GPAA48130AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA 208\/230V to 24V — HT01BD209 for Model PY4GPAA48130AA\u003c\/h1\u003e\u003cp\u003eThis genuine OEM Carrier control transformer (part number \u003cstrong\u003eHT01BD209\u003c\/strong\u003e) is the factory-specified replacement for the \u003cstrong\u003eCarrier PY4GPAA48130AA\u003c\/strong\u003e packaged unit. The transformer steps down line voltage from 208\/230V to a stable 24V output, powering the entire low-voltage control circuit — including the thermostat, contactor coil, control board, and zone valves. When the transformer fails, the result is often total system lockout: a blank thermostat, no response from the unit, or a blown low-voltage fuse caused by a shorted secondary circuit. Replacing it restores full system communication and control.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 208\/230V primary | 24V secondary | 40VA rating | 50\/60 Hz | Replaces OEM part numbers HT01BD207, HT01CN232, and 9076-00\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This is the genuine Carrier OEM part — factory-wound to exact VA and voltage tolerances. Undersized or off-tolerance aftermarket transformers can overheat, trip thermal cutoffs, or fail to supply adequate current to contactor coils, causing nuisance lockouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before servicing. Tools needed: flathead and Phillips screwdrivers, multimeter (to verify 24V output post-install and confirm no secondary short before energizing). Label or photograph all wiring connections prior to removal.\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 Designed for the Carrier \u003cstrong\u003ePY4GPAA48130AA\u003c\/strong\u003e packaged unit. Cross-references OEM part numbers HT01BD207, HT01CN232, and 9076-00. Always confirm your unit's data plate voltage before ordering. Our fitment team is available to verify compatibility before you buy — order with confidence and get your system back online today.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640312648051,"sku":"CARRIE-PY4GPAA48130AA-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640312680819,"sku":"CARRIE-PY4GPAA48130AA-TRANSFORMER-HT01BD209-GEN","price":44.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BD209_96727aef-5973-4e16-82c5-a06ae033aa6a.jpg?v=1775025528","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py4gpaa48130aa-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}