Good evening, I have a Fiesta 1.4 HHJD engine year 2009 66Kw, the cooling fan starts sporadically both when the engine is hot and cold, I have replaced the water temp sensor without success.

I have no DTCs in the diagnosis or in the air-conditioning system

The pressure of the climate system is 7 Bar with the climate off and 10.2 with the climate on

The DPF has 8 millibars of back pressure

the customer replaced the relay that drives the fan (original Ford).

do you have any pointers to give me?