when i start my truck... the fan sounds like a turbine engine running. it runs like that for a while. maybe 15 20 min. and even when its warmed up and i turn it off when it finally stops running...it does the same. i feel like its bad. its sucking the power out of my truck! if its bad.... maybe if anyone has one laying around they dont need...pls help me out till i put an electric fan on. thx yall.