{"product_id":"oem-lennox-transformer-kit-17w56","title":"OEM Lennox Transformer Kit — 17W56","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e17W56\u003c\/strong\u003e transformer kit steps down incoming line voltage (typically 120V or 240V) to the 24V low-voltage control power your furnace, thermostat, and control board rely on. Nearly every low-voltage function in the system — from the thermostat call for heat to the gas valve and relays — depends on clean, stable output from this transformer. The kit includes the mounting and wiring components for a straightforward replacement in compatible Lennox equipment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e17W56\u003c\/strong\u003e transformer fails, the furnace and thermostat typically go completely dead with no 24V control power. You may find a blank thermostat display, no response to a heat call, or a repeatedly blown low-voltage fuse. Transformers commonly fail from a short in the control wiring, a stuck contactor, or simple age-related winding breakdown.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e The Lennox \u003cstrong\u003e17W56\u003c\/strong\u003e is matched to your system's VA load rating and primary voltage. An undersized or mismatched aftermarket transformer can overheat, deliver unstable voltage, or fail prematurely under load. Choosing the OEM part guarantees the correct capacity and mounting for dependable control power.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081114239347,"sku":"LNX-17W56","price":29.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-transformer-control-LNX-17W56.jpg?v=1783763977","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-transformer-kit-17w56","provider":"National HVAC Parts","version":"1.0","type":"link"}