Join the club. I too am a sufferer of the faulty Ford radios. Im afraid it is a common problem. It appears to be a fault in the tuning circuitry of the radio. My radio began channel hopping of its own accord and then for a finish it wouldnt tune at all. I now just have static. Problem is if you get a replacement from Ford it will cost you dear and if you get one from e-bay , there's nothing to say the same thing won't happen to the new one.
Gary
June 2011