Symptoms of thermostat failure.

1, thermostat failure, thermostat opening too small, the engine size cycle is affected, the engine heat can not be effectively distributed out, the engine water temperature rises, the water temperature alarm light on.

2, the thermostat is open too large, resulting in the engine water temperature being too low, the water temperature rising slowly, fuel consumption increases, and the engine rattles.

3, the thermostat appears to be stuck, easy to form carbon deposits, resulting in unstable engine idle speed, so the engine shaking.