I did buy my neighbor this programmer to control its water heaters because they are only 2 at home and 200 liters of hot water may be enough for 2 or 3 days ... so my advice he ordered on Amazon and well received. It is true that the default is that no instruction in French but going on the product website "chilitec" you have the manual in German that you copy gogle translation and voila voila! In a childlike simplicity !!! Very good product that I recommend! I LIKEEEEEEEEEE