Electroventilator

I have a problem with electrventilator of my Fiat Siena 1300 year 1999 it does not work for me and I do not want to change the aesthetics to my car installing directly for which it works already changed the temperature bulb and follow the same thing that it can be I thank it for it can help me

Check first if the electro-ventillator engine works directly to the battery
if it works (electro good motor) when disconnecting the temperature sensor (as new should be OK) the ECM will emit a protective voltage activating the electro-ventillator, it will turn on just when you disconnect it even if the engine is cold, if nothing happens, nothing verifies the relay and the fuse if they are ok. Check the arrival voltage to the electro connector if it arrives verifies that the connector pins are making contact with those of the electro (which is quite common) and in the case that the electro connector does not reach the electro connector verifies that the cable is not cut on the path of the electro's rel Activating it manually would not be any comfortable even if it is with a switch and relay since you must always be aware of the temperature (when you transit in the city since on the road the same wind will cool the radiator coullant)
and in the case that another person should use the vehicle, will it be constantly fixed at temperature? For this reason you must seek the way that this is automatically activated according to the work parameters determined by the ECU.