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Thermostat stuck open or no stat at all. Faulty temp sensor or Gauge.

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12y ago

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Why would a temp gauge in a car go up like the car is going to overheat when the temp gauge sytem light stays off?

You may have air trapped in the cooling system.This will cause the gauge to spike. Try this: remove the radiator cap and allow the engine to run for about 20 minutes. Add coolant as necessary. If this does not work I would replace the stat. Finally, I would check the actual cooalant with a thermometer to determine the actual temp. I hope this helps you. Mark


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A faulty thermostat might cause the temp gauge on the 2000 Nissan Altima to raise to hot when the car is not overheating. A faulty thermostat can cause the gauge to move up and down and might even turn the fan on.


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Why would the temp gauge rise to max temp on a BMW 318i se e46 even though the car is cool and return to normal after a while but cause sluggish behavior even after replacing the thermo sensor?

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