Reach-In Cooler Unit was too cold and making loud noise. Noise was coming from fan blade hitting wire, moved wire and zip tied in place. Ice ball in back of evaporator coil due to refrigerant leak. Found leak in evaporator coil. Added Freon to system. Suction pressure is low due to a partially clogged capillary tube. Temp control looked corroded. Will send estimate for repair. **Travel on WO# 172660