{"product_id":"oem-lennox-transformer-13h28","title":"OEM Lennox Transformer — 13H28","description":"\u003cp\u003eThe genuine OEM Lennox \u003cstrong\u003e13H28\u003c\/strong\u003e transformer steps down incoming line voltage to the low-voltage (typically 24V) control power that runs your thermostat, control board, relays, and safety circuits. It's the electrical heart of the control system, and virtually every Lennox furnace and air handler relies on a healthy transformer to operate.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e A failed \u003cstrong\u003e13H28\u003c\/strong\u003e often shows up as a completely dead thermostat, a blank control board, a system that won't respond to any call for heat or cool, or a repeatedly blown low-voltage fuse. Transformers can burn out from a shorted control wire, overheat, or simply fail with age — sometimes with a faint burnt smell.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Matching the exact VA rating and secondary voltage is essential for stable control power. The factory Lennox \u003cstrong\u003e13H28\u003c\/strong\u003e is spec'd to your equipment's load, mounts correctly, and provides clean, reliable output that protects the board and downstream components. Generic transformers with the wrong rating can under-power the system or fail prematurely.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081115287923,"sku":"LNX-13H28","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-13H28.jpg?v=1783763986","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-transformer-13h28","provider":"National HVAC Parts","version":"1.0","type":"link"}