Got a call from restaurant that their freezer wasn't cold. Evaporator totally iced.
I thaw it and discover that the defrost clock (paragon 8145-00) not working. Replace it then discover that heat element broken. Replace it and the high limit switch and fan/defrost switch. Evacuated and put in 23oz of 404A as called for by manufacturer. Won't get below 30f. This is a double tube system. I'm pretty sure its not leaking. I'm going to remove and weigh what I put in to make sure. The condensing unit is filthy covered in grease. I cleaned it up pretty good. My next plan is to replace filter/drier. Any Ideas?