I have a 2008 Edge with towing package. Last week it overheated on my wife and the check engine light came on with code P0480: Cooling fan 1 Control Circuit Malfunction. Assuming it was either a fan problem or the fan relay problem, I bought the whole cooling fan assembly on Amazon and replaced it today. After replacing it, neither fan turned on when I started the Edge. I took it out for a drive and once the car reached normal temperature (gauge in middle between hot/cold) BOTH fans kicked on and never turned off. Even after I got home and shut the car off BOTH fans continued to run loudly for 10 minutes until I pulled the fuse. I'm stumped... Could the Coolant Temp Sensor cause this kind of issue?