What are the Common Symptoms of Failed Thermostat in Volvo?

All we know is that the thermostat is an important component of the cooling system that can monitor and regulate the flow of coolant in the engine block. While running the engine, when it is overheated, the thermostat will be forced to open to allow the coolant to travel from and to the radiator to keep the engine. When the thermostat is damaged, you will notice the signs defined in the following video.