hi overheating , first check that your coolant system IS overheating, a faulty or bad connection on temp sender will trigger temp gauge going right up, STOP Engine Warning light on, and cooling fan coming on. Feel the TOP Radiator Hose it will be HOT, Feel the Bottom Rad hose if it is COLD you have a thermostat problem, You may also find your Air Con has stoped Working, as there is a sensor in the thermostat housing that works your air con. this is what they refer to as a Electronic Thermostat. A New thermostat will set you back $300 in Australia for a genuine Part, search eBay. these type of units are also fitted to British and Euro Cars . Hope this Helps
John Anderrson, August 2016