I have a 2002 Ford Taurus with 219000+ on it. The las couple times that I have driven when the air temp was over 85 the temp gage moves to hot when the air is on. When I turn the air off the temp comes down. I have checked the fans and they are running. I also looked at the condenser and it seems to be clear. I have talked with some one and he suggested flushing the radiator. Would that help or could something else be wrong?