My fridge was acting up for a while, but it was an intermittent problem. Every time it seemed convenient for me to call someone to come look at it; it would be working fine!? Finally one day it just quit working completely. The big brand name dealer said they could send someone out to have a look in four days and then order the parts it would need. I called Duo, he asked me a few questions on the phone; said he knew exactly what it needed and showed up with the part that afternoon! The fridge has worked perfectly ever since.