Posted on 9/26/2025
The thermostat in your car regulates the engine temperature. It opens and closes depending on how hot or cold the engine is, helping coolant flow through the system when needed. When the thermostat functions correctly, your engine stays within its ideal temperature range. But when it gets stuck (either open or closed), it can lead to performance issues or even engine damage. Here’s how to recognize when your thermostat isn’t working like it should. What the Thermostat Actually Does The thermostat is a valve located between the engine and the radiator. When you start your car, the thermostat remains closed so the engine can warm up quickly. Once the engine reaches a certain temperature, the thermostat opens to allow coolant to circulate and maintain a steady temperature. This on-off process keeps the engine from overheating and also prevents it from runnin ... read more