Whirlpool side by side not cooling

Question

this box is less than 6 yrs old and about a week ago the coils would just freeze up with ice after thawing it it would work fine for a day or 2 and same problem again. I turned the refridge on it's side to get ez access to clean the coils of dust and dirt and now it dosen't cool at all, the fans and compressor are running but still not getting cold not even a little bit. I tested the temp controlls with a meter and it test good.what might be wrong?ThanksGene