As soon as I noticed the a/c icing up, I called A-Adkins. They came out that day, turned the unit off, and came back in the morning to check it out. I only needed a pound of Freon for my 10-year old unit. That solved the problem cost-efficiently, promptly, and carefully. They also reviewed all parts of the system as a precaution.
I have used this company for over 10 years.