OEM Norcold 634677 REV E Temperature Monitor Control Kit, removed from a working RV refrigerator (model 1210) that was replaced due to faulty door seals. All components have been tested and are in good working condition. Includes: - 634677 REV E control board - Black protective housing - Thermocouple assembly with 25" wire - Green ground wire (8") - Blue limit wire (17") - Red limit wire (17") - Rear mounting clip This kit is compatible with Norcold 1200, 1201, 1210, 1211, and 2118 series refrigerators. It monitors boiler temperature and disables heat sources if overheating is detected?an essential safety feature for RV refrigeration systems. No installation instructions included. Please verify compatibility with your unit before purchase. Ships securely packaged. Free returns accepted within 30 days.