{"product_id":"source-1-1663677-control-circuit-board-663677-d32","title":"Source 1 1663677 Control Circuit Board  663677  #D32","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 1-year warranty. 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\n\u003cp\u003eThe \u003cstrong\u003eSource 1 1663677 Control Circuit Board\u003c\/strong\u003e is a replacement control board designed for use in HVAC systems. Also referenced as part number \u003cstrong\u003e663677\u003c\/strong\u003e, this board manages critical system functions including heating and cooling stage sequencing, fan control, and safety circuit monitoring.\u003c\/p\u003e\n\n\u003cp\u003eThis control circuit board is engineered to provide reliable, precise operation within compatible Source 1 and related OEM furnace and air handler units. It serves as the central hub for thermostat signal processing and component activation, ensuring efficient system performance. The board is a direct replacement for failed or malfunctioning original equipment boards, making it a practical solution for HVAC service and repair professionals.\u003c\/p\u003e\n\n\u003cp\u003eAs a certified pre-owned unit, this board has been inspected and tested to verify proper functionality. It is suitable for residential and light commercial HVAC applications where the original Source 1 control board is specified.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eKey Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e Source 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e 1663677\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eAlternate Part Number:\u003c\/strong\u003e 663677\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eComponent Type:\u003c\/strong\u003e Control Circuit Board\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e HVAC furnace and air handler systems\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFunction:\u003c\/strong\u003e System sequencing, fan control, and safety circuit management\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage:\u003c\/strong\u003e Typically rated for 24V control circuit operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eInternal Reference:\u003c\/strong\u003e #D32\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eIf you have questions about compatibility with your specific HVAC system or need assistance identifying the correct replacement board, please contact us before purchasing.\u003c\/p\u003e","brand":"Source 1","offers":[{"title":"Default Title","offer_id":43672961089645,"sku":"13208","price":285.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/2419\/1853\/files\/s-l800_e4fb944f-f2d4-4c89-8b1c-e255aa61e229.jpg?v=1763344713","url":"https:\/\/willardshvacsupply.com\/products\/source-1-1663677-control-circuit-board-663677-d32","provider":"Willard's HVAC Supply","version":"1.0","type":"link"}