Found Reach-In Cooler unit on and running at 55 degrees. Checked amp draw on compressor it was low. There was a low side access port in unit found unit running in a vacuum. Pulled apart evap section and condensor section and tested for leaks found leak upon braze joint on heat exchanger. Cannot work on u it where it is located will take to shop and repair and return. Compressor was running very hot but will not know if any other components were damaged until leak is fixed and I it is recharged and running. 02/06/2019 Removed charge from system. Removed filter drier and I stalled new drier. Fixed leak on heat exchanger connection. Charged with 110 lbs nitrogen and held for 20 min. ok no leaks. Pulled 500 micron vacuum and then charged with 110 grams R290 factory charge. Ran and cycled several times and watched pressures ok. Helped Sean with unit. 2-7-19 Returned cooler and set back in place ran power cord back thru chase and plugged in. Ran and cycled cooler at 33 degrees ok.