I just recently set up a walk-in cooler and I am having a slight issue. I git the lines ran and it is charged up and all that fun stuff. I did have a bad solenoid so I replaced that. Now it is shutting off at temp, which it didn't do before, but now once it shuts off it kicks back on every 30 seconds or so but only runs for a second or two. It sounds like there is a hissing sound coming from the compressor. It almost sounds like there is pressure bleeding back into the line where it then kicks the compressor back on long enough for the pressure to pump down. My question is, is there something in the compressor, seals, o-rings or such, that could be causing this? Could it just need a rebuild or a new seal/gasket kit? Any help would be greatly appreciated.