{"product_id":"trane-american-standard-21c668814g01-control-circuit-board-cnt-03304-d387","title":"Trane American Standard 21C668814G01 Control Circuit Board CNT 03304  #D387","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• Model Number: 21C668814G01\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e• Alternate Part Number: CNT 03304   • Function: Control circuit board for furnace operation management   • Role: Coordinates and executes voltage distribution to unit components   • Compatibility: Fits select Trane and American Standard furnace models   • Replaces: KIT20350 and other older related control board part numbers   • Features: Monitors sensors and safety switches continuously for system protection   • Application: within heating systems to control ignition sequences, blower motors, and safety circuits   • Warranty: Supported by return policy through seller   • Shipping: Free standard shipping with available overnight options\u003c\/p\u003e","brand":"American Standard","offers":[{"title":"Default Title","offer_id":43672877695085,"sku":"12234","price":192.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0637\/2419\/1853\/files\/s-l800_7384ec4a-f0bb-4c26-9a41-f3da5b0c1fce.jpg?v=1763341330","url":"https:\/\/willardshvacsupply.com\/products\/trane-american-standard-21c668814g01-control-circuit-board-cnt-03304-d387","provider":"Willard's HVAC Supply","version":"1.0","type":"link"}