{"product_id":"carrier-py3gpaa30040na-transformer-h30291","title":"OEM Carrier Transformer 40VA 208\/230V–24V for PY3GPAA30040NA","description":"\u003ch1\u003eOEM Carrier 40VA Control Transformer HT01BD209 for Model PY3GPAA30040NA\u003c\/h1\u003e\u003cp\u003eThis OEM control transformer is the factory-specified replacement for the \u003cstrong\u003eCarrier PY3GPAA30040NA\u003c\/strong\u003e packaged unit. The transformer steps down 208\/230V line voltage to the 24V signal used by the thermostat, control board, contactor coil, and every other low-voltage component in the system. When it fails, the entire control circuit goes dark — the thermostat goes blank, the unit will not respond to any call for heating or cooling, and in some cases a tripped secondary fuse is the only visible clue. Always check the transformer output with a multimeter before replacing other components, as a failed transformer is one of the most commonly misdiagnosed \"board failure\" calls in the field.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 40VA capacity | 208\/230V primary input | 24V secondary output | 50\/60 Hz | Class 2 control transformer | Foot-mount bracket included\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This genuine Carrier OEM unit is wound to exact VA and insulation-class specifications. Off-brand transformers rated at 40VA may sag under sustained load, causing intermittent control lockouts and nuisance faults that are difficult to diagnose.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Shut off power at the disconnect and breaker before starting. Tools needed: flathead and Phillips screwdrivers, wire stripper, multimeter. Note wire colors and terminal labels before disconnecting the old unit. Verify 24V output before buttoning up the panel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty \u0026amp; Supersession:\u003c\/strong\u003e 1-year OEM factory warranty. Directly replaces obsolete part numbers HT01BD207, HT01CN232, and 9076-00. Ships same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered for Carrier model \u003cstrong\u003ePY3GPAA30040NA\u003c\/strong\u003e packaged gas\/electric units. Confirm your unit's data plate shows 208\/230V single-phase primary voltage before ordering. Our fitment team is available to verify compatibility prior to purchase — no guesswork required.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640441819507,"sku":"CARRIE-PY3GPAA30040NA-TRANSFORMER-HT01BD209","price":50.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640441852275,"sku":"CARRIE-PY3GPAA30040NA-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_91be437d-7af3-4af8-89ba-4e59e5a6cc1c.jpg?v=1775041640","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3gpaa30040na-transformer-h30291","provider":"National HVAC Parts","version":"1.0","type":"link"}