radiator fan always on on 2003 Mercedes-Benz C32 AMG

been to two garages they tell me it is the fuel control module that is bad. I have replaced the fan so that is new. Diagnostic test showed it was a bad module. Is this possible?

Asked by for the 2003 Mercedes-Benz C32 AMG
Help us help you by giving more info. Did they perform diagnostics? Any fault codes? We dont have enough info at this point. Repost and I will try to help! Greg