Ford Focus Motor KKDA

Hello everyone, I write in this forum to see if there is a partner who has had the problem in which a Ford Focus Motor KKDA 1.8 TDCI year 2006 has lit the red light of fault in the cooling circuit. I wonder what may be due and that possible solutions could be adopted. Thank you very much

Good partner, look ord when you do not have temperature watch and on occasions when it is, they turn on the red light to warn a low refrigerant level, check the level and tell us how it went, it is complicated that it is something else unless you let you know that, if it is not low level you are heating the vehicle, due to the fan problems, now if it does not hot it is only lack of water and nothing else,