{"product_id":"oem-lennox-building-controller-24vac-17m12","title":"OEM Lennox Building Controller 24VAC — 17M12","description":"\u003cp\u003eThe Lennox \u003cstrong\u003e17M12\u003c\/strong\u003e is a genuine OEM building controller designed to manage auxiliary loads such as lights, ventilation hoods, exhaust fans, and sprinkler circuits. Operating on a 24VAC supply (±25%, 50\/60Hz, 2VA draw), it provides reliable low-voltage switching and coordination between your Lennox equipment and connected building accessories, keeping control logic synchronized across the system.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCommon failure symptoms:\u003c\/strong\u003e When the \u003cstrong\u003e17M12\u003c\/strong\u003e fails, you may notice unresponsive or intermittent lights and exhaust fans, vent hoods that won't engage on demand, erratic sprinkler activation, or a complete loss of accessory control despite proper power at the input. Voltage spikes, moisture intrusion, and age-related component drift are frequent causes of controller breakdown.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy OEM matters:\u003c\/strong\u003e Lennox engineers the 17M12 to precise voltage tolerances and communication standards for their platforms. Aftermarket substitutes can introduce timing mismatches, nuisance faults, and warranty complications. Choosing this factory-original part guarantees correct fit, rated 24VAC performance, and dependable long-term operation across your Lennox building system.\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":63081080553843,"sku":"LNX-17M12","price":39.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/1190\/5395\/files\/nhvac-flue-vent-pipe-LNX-17M12.jpg?v=1783759527","url":"https:\/\/nationalhvacparts.com\/products\/oem-lennox-building-controller-24vac-17m12","provider":"National HVAC Parts","version":"1.0","type":"link"}