What are the symptoms of a faulty thermostat in a Chevrolet Cruze?

1 Answers
SanAlyssa
07/30/25 3:13am
When the thermostat in a Chevrolet Cruze malfunctions, the following symptoms may occur: 1. The thermostat fails to open, the temperature gauge shows high temperature, and the engine temperature rises, but the coolant temperature in the radiator remains low. Touching the radiator does not feel hot. The thermostat automatically adjusts the amount of coolant entering the radiator based on the coolant temperature, altering the circulation range to regulate the cooling system's capacity, ensuring the engine operates within the appropriate temperature range. 2. If the car thermostat does not close, the water temperature will rise slowly, especially in winter, where the temperature may remain in the low range even after more than ten minutes, accompanied by high idle speed. The thermostat must maintain good technical condition; otherwise, it will severely affect the engine's normal operation. If the main valve of the thermostat opens too late, it can cause the engine to overheat. If the main valve opens too early, it prolongs the engine warm-up time, resulting in the engine temperature being too low. During regular maintenance of the cooling system, it is important to clean scale and dirt from the thermostat. If damage is detected, it should be replaced promptly.
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