What temperature do you keep the keggerator at? Where is the temp probe? I recently had no flow in all of my taps and couldn't figure out why. Everything seemed to be set up properly. I had my Johnson temp controller set at 39 degrees with a diff of 2 degrees so I thought for sure freezing wasn't the issue. But it was. I went to grab the kegs and they were both frozen solid. After further investigation, I realized that my temp probe was near the top of the keggerator which was about 12 degrees warmer than the bottom, which was at around 25 degrees. What I did to fix that was put a fan into the keggerator for better airflow and less temp differential. I attached the temp probe to a glass of water and put it near the bottom. I thawed the kegs out and now everything works great!