What should we do? If coolant temperature warning light turns on. Attention! Do not try to open the radiator cap! The radiator contains hot water under high pressure. If the cover on the radiator is opened, pressurized and steamed air can cause severe burns. There is no intervention type that you can do with a hot motor. That’s why let your car cool down. In addition to this, opening the cover of a hot engine can lead to greater costs. This is because, high pressure will drain the water and cause the motor to stay dry and burn the gasket. Wait at least half an hour or more. After the engine has cooled down, you can open the radiator cap and check the coolant level. Firstly, cover place with a cloth on the cap and slowly turn the cap until it stops in the first lock. In this way, you can ensure that the pressure inside is released safely. Wait until all the pressure is out before you open the cap.If liquid is missing; add water or antifreeze to the radiator or coolant reservoir. I