7 Common Symptoms of a Bad or Failing Engine Thermostat

Common signs and symptoms of a bad engine thermostat and how to test if it has failed. Amazon Link Infrared Thermometer: https://amzn.to/43VE9i9 How To Test an Engine Thermostat with an Infrared Thermometer https://www.youtube.com/watch?v=0ThSZJdWv-4 How To Test an Engine Thermostat with No Tools Video https://www.youtube.com/watch?v=sGJNsfdi5XM Symptoms of a Bad or Failing Thermostat. High temperature readings (Engine Overheating). Not heating up when weather is cold. Coolant fans stay on constantly. Erratic changes in temperature. Unusual noises. Coolant Leaking. Heater problems. By using this information user assumes all risk of use.