I own a 07 Edge and just recieved a letter from ford today stating that in some edges cooling system, corrosion may lead to contamination of the heater core and inaffective heating performance. Its not a total recall, but the letter states if you have heating problems then bring it in to service and they wil determine if you need a system flush or a core replacement. Has anyone else recieved this letter from Ford, I have no problems but wanted to see if others have had problems or recieved the letter like I have, thanks for any feedback. Rich