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Check that the coolant level is OK in the radiator itself, not just the reservoir. Sometimes the overflow system can become vapor locked and the system will not draw from the reservoir if it needs it. Do check: * Make sure the motor is cool! Don't do this at a gas station, do it at home after the car has been sitting for a few hours. If you don't heed this warning you will scald yourself. * Open the radiator cap. * If the radiator is not full of coolant, top it off. If it is empty you may want to do this check a few times, as there may be air in the system. Filling it up directly should remove the vapor lock and it should draw whatever else it needs from the reservoir.

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Q: Low antifreeze light is on but it is full. Running hot.?
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