the appliance makes a lot of noise ... . Some noise is normal and other types of noise can be solved easily. You need to be able to distinguish between these types of noise: Perfectly normal noise . The sound of water flowing in cycles, gurgling, is due to the pump, which circulates the water to enhance the power of the appliance. 46 Things to check before calling the Technical Service . A dull, humming sound is inevitable due to the compressor. . A short clicking sound is produced when the pump