7 Common Symptoms of a Bad or Failing Thermostat

Common signs and symptoms of a bad engine thermostat and how to test if it has failed.
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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.

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