First post so i will try to give as much information as i can. It is a Traulsen reach in double door cooler it is using R-22. The call i recieved was the unit had frozen the cheese in the cooler. My attempt to adjust the pressure controller did nothing so i replaced the pressure controller. So i turned the machine back on to check my superheat to make sure my charge was correct. Until the unit got down to temp it was running about 40 degrees superheat as soon as it got down to temp it came down to 14 degrees and was running fine. The problem i am having i left my thermometer on the suction line and as soon as the machine would shut off the suction temp line temperature would shoot up and the short cycling of the machine would start till eventually it is not cooling the cooler. By the way this is like my 3 call.