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At what temperature does the Buick Regal's cooling fan start?

2 Answers

VonBraxton

07/24/25 12:34am

Buick Regal's cooling fan starts when the coolant temperature exceeds 90 degrees Celsius. Fan operation: The car's electric fan is controlled by a thermostat. When the coolant temperature rises to the upper limit, the thermostat activates the power supply, and the fan starts working. When the temperature drops to the lower limit, the thermostat cuts off the power, and the fan stops. How to determine if the fan is faulty: Visually inspect the fan motor's ventilation port for any signs of burnt coils. If there are burn marks, it indicates the fan motor coil is burnt out and unusable. Smell the fan motor for any burnt coil or plastic odors. If present, the fan is unusable.

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NoahAnn

08/10/25 8:21pm

I've been driving a Buick Regal for many years, and the cooling fan typically kicks in around 102°C. When the engine reaches this temperature, the fan automatically activates to assist with heat dissipation, preventing engine overheating—especially noticeable during hot summers or in traffic jams. If the air conditioning is on, the fan starts earlier, usually around 100°C. You'll hear the fan noise when the temperature gauge shows this position, which is part of the normal design logic to protect the engine. If the temperature rises to 110°C and the fan still doesn't start, it could indicate a stuck thermostat or insufficient coolant. I recommend owners regularly check the antifreeze level, replace it every two years, and ensure the radiator stays clean. While driving, the coolant temperature usually fluctuates between 90°C and 100°C—keeping an eye on the temperature gauge helps detect issues early and prevent more serious damage. Overall, the fan's operating temperature is set within the 95°C to 105°C range, with slight variations depending on the model year and air conditioning status.

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