{"product_id":"carrier-py3geaa36090aa-transformer-h2uxan","title":"OEM Carrier Transformer 120V–24V 40VA for PY3GEAA36090AA","description":"\u003ch1\u003eOEM Carrier Transformer 120V–24V 40VA for Model PY3GEAA36090AA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BC701\u003c\/strong\u003e) is the factory-specified control circuit transformer for the \u003cstrong\u003eCarrier PY3GEAA36090AA\u003c\/strong\u003e packaged unit. The transformer steps down 120V line voltage to the 24V signal voltage that powers your thermostat, control board, and all low-voltage switching components. When the transformer fails, the entire control circuit goes dark — your thermostat becomes unresponsive, contactors won't energize, and the system produces no heating or cooling whatsoever. It is one of the most overlooked yet most critical components in the unit.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e Primary voltage: 120V AC | Secondary voltage: 24V AC | VA rating: 40VA | Factory-matched OEM tolerances | Includes integral secondary circuit protection\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e This OEM Carrier part (HT01BC701) is wound to exact factory VA and voltage tolerances. Generic transformers may run under-rated VA, causing overheating, nuisance tripping, or premature failure of downstream control boards.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power at the disconnect box and verify zero voltage with a multimeter before handling. Tools needed: flathead and Phillips screwdrivers, needle-nose pliers, multimeter, wire nuts or fork terminals. Always label low-voltage wiring (R, C, G, W, Y) before disconnecting the old unit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 1-year OEM factory warranty against defects in materials and workmanship. Orders placed before 3 PM local time ship same business day from our warehouse.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Engineered as a direct OEM replacement for the Carrier \u003cstrong\u003ePY3GEAA36090AA\u003c\/strong\u003e packaged unit. Confirm your unit's data plate shows a 120V primary \/ 24V secondary control transformer before ordering. Not sure if this fits? Our HVAC parts specialists verify fitment before you buy — contact us anytime.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640496804211,"sku":"CARRIE-PY3GEAA36090AA-TRANSFORMER-HT01BC701","price":34.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640496836979,"sku":"CARRIE-PY3GEAA36090AA-TRANSFORMER-HT01BC701-GEN","price":30.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC701_9b410d61-6309-47b1-b14e-53584a15f32c.jpg?v=1775041072","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py3geaa36090aa-transformer-h2uxan","provider":"National HVAC Parts","version":"1.0","type":"link"}