{"product_id":"carrier-py4gewb48090aa-transformer-h2uxan","title":"OEM Carrier Transformer 40VA 120V→24V for PY4GEWB48090AA","description":"\u003ch1\u003eOEM Carrier Control Transformer 40VA for Model PY4GEWB48090AA\u003c\/h1\u003e\u003cp\u003eThis OEM replacement transformer (part number \u003cstrong\u003eHT01BC701\u003c\/strong\u003e) is the factory-specified step-down transformer for the \u003cstrong\u003eCarrier PY4GEWB48090AA\u003c\/strong\u003e packaged gas\/electric unit. The transformer steps down 120V line voltage to the 24V AC signal that powers the entire low-voltage control circuit — including the thermostat, control board, contactor coils, and gas valve. When this part fails, the entire control circuit goes dead: the thermostat loses communication, the unit won't respond to any call for heating or cooling, and you may find a blown fuse on the control board as a secondary symptom.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpecs:\u003c\/strong\u003e 120V primary | 24V secondary | 40VA rated | Factory-matched OEM replacement for Carrier part HT01BC701\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOEM vs Generic:\u003c\/strong\u003e OEM transformers are wound to exact VA and voltage tolerances for the Carrier control board. Under-rated or off-tolerance generic transformers can overheat, trip thermal protection, or cause erratic board behavior and nuisance lockouts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall Difficulty: 2\/5\u003c\/strong\u003e — Disconnect all power before servicing. Tools needed: flat-head and Phillips screwdrivers, multimeter (verify 24V output after install). Always photograph or label existing wiring before disconnecting terminals. Replace any blown 3A control fuse at the same time.\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 Engineered specifically for the \u003cstrong\u003eCarrier PY4GEWB48090AA\u003c\/strong\u003e 4-ton 90,000 BTU packaged gas\/electric unit. Verify your existing transformer's primary voltage (120V) and VA rating against your unit's data plate before ordering. Our parts specialists are available to confirm fitment before you buy — contact us anytime.\u003c\/p\u003e","brand":"Carrier","offers":[{"title":"OEM","offer_id":62640334373235,"sku":"CARRIE-PY4GEWB48090AA-TRANSFORMER-HT01BC701","price":40.95,"currency_code":"USD","in_stock":true},{"title":"Generic","offer_id":62640334406003,"sku":"CARRIE-PY4GEWB48090AA-TRANSFORMER-HT01BC701-GEN","price":35.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-HT01BC701_d42b1e5c-94c6-4897-a35e-88a2afc11fec.jpg?v=1775041475","url":"https:\/\/nationalhvacparts.com\/products\/carrier-py4gewb48090aa-transformer-h2uxan","provider":"National HVAC Parts","version":"1.0","type":"link"}