Especially during the cold seasons with temperatures far below the freezing point it is essential to avoid that the cooling water freezes and to have enough antifreeze in the cooling water.
In general, frost protection is only necessary below 25 degrees Celsius but frozen cooling water can cause considerable damage - a risk which can be minimized with the HEYNER® premium antifreeze tester AntiFrost TEST.
The antifreeze tester indicates at which temperatures the cooling water would freeze. Depending on the result, it is recommended to pump down the cooling liquid or to replace it by a pure radiator antifreeze.