What is the function of a thermostat?

1 Answers
ChaseFitz
07/30/25 7:29am
The function of a thermostat is to automatically regulate the amount of water entering the radiator based on changes in coolant temperature, while also altering the circulation range of the water. This achieves the adjustment of the cooling system's heat dissipation capacity, thereby ensuring the engine operates within an appropriate temperature range. A thermostat is a valve that controls the flow path of the coolant, serving as an automatic temperature-regulating device. It typically contains a temperature-sensitive component that opens or closes the flow of air, gas, or liquid through thermal expansion or contraction. The thermostat must maintain good technical condition; otherwise, it can severely affect the normal operation of the engine. For instance, if the main valve of the thermostat opens too late, it can cause the engine to overheat. Conversely, if the main valve opens too early, it prolongs the engine's warm-up time, resulting in the engine temperature being too low.
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