What are the symptoms of a faulty thermostat in the Buick Excelle?

[PenelopeMarie]

A faulty thermostat can lead to several issues. If the thermostat opening is too small, it affects the engine's circulation, preventing effective heat dissipation. This results in elevated engine coolant temperature and triggers the coolant temperature warning light. Conversely, if the thermostat opening is too large, it causes the engine coolant temperature to be too low, leading to slow temperature rise, increased fuel consumption, and abnormal engine noises. A stuck thermostat can easily cause carbon buildup, resulting in unstable engine idle and engine vibration. Below is more information about the thermostat: 1. The thermostat is a valve that controls the flow path of the coolant. It is an automatic temperature-regulating device, typically containing a temperature-sensing component that opens or closes the flow of air, gas, or liquid through thermal expansion or contraction. 2. The safe lifespan of a thermostat is generally 50,000 kilometers of vehicle mileage, so it is recommended to replace it regularly according to its safe lifespan.