{"product_id":"lennox-18m3401-furnace-control-circuit-board-50m61-120-york-150-0738","title":"LENNOX 18M3401 Furnace Control Circuit Board 50M61-120 York 150-0738","description":"\u003cp\u003e\u003cstrong\u003e\u003cem\u003eThis product may contain shelf wear, have minor cosmetic imperfections, or have been tested. All our certified pre-owned products are backed by our return policy. We offer free shipping on all items. Please contact us for discounts or if you have any questions. We look forward to doing business with you!\u003c\/em\u003e\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e· Two-stage integrated furnace control circuit board with SureLight ignition system\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e· Compatible with Lennox, Armstrong, Ducane furnace models · Replaces part numbers: 18M34, 18M3401, White Rodgers 150-0738, SureLight 50M61-120, 50M61-120-02 · Controls gas valve stages (first and second stage) for precise heating output · Monitors safety switches including rollout, pressure switches, and limit switches · 12-pin terminal block with designated connections for gas valves, pressure switches, rollout switch, limits, humidifier, and thermostat · Includes integrated control with transformer (40VA, 120V primary, 24V secondary) and door switch function · Supports blower motor operation with fan delay controls and variable speed management · LED display for furnace status and error diagnostics with flashing code feedback · Built-in heating isolation relay and heat anticipator settings for reliable furnace operation · Accessory terminals rated for 1 amp each, including a 24V humidifier terminal · Designed to prolong ignitor life with precise timing and control functions · OEM upgraded White-Rodgers circuit board design for improved performance and reliability\u003c\/p\u003e","brand":"Lennox","offers":[{"title":"Default Title","offer_id":43672915673197,"sku":"12649","price":262.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/2419\/1853\/files\/s-l800_117a370d-86f9-4237-b743-200c40aedbee.jpg?v=1763342778","url":"https:\/\/willardshvacsupply.com\/products\/lennox-18m3401-furnace-control-circuit-board-50m61-120-york-150-0738","provider":"Willard's HVAC Supply","version":"1.0","type":"link"}