Manufacturing device history record (dhr) review was not performed because the device is over twelve (12) months old, and a dhr review is not required.No causes or potential causes of the customer's reported problem were found during the review of service and repair records.A product sample was received for evaluation.Visual and functional testing were performed.Visual inspection found cracked tank cover, corroded drain fitting, damaged power switch, and faded line cord.Functional testing found the pump is noisy - worn or defective parts inside the pump.No action taken due to the age and condition of the device.It is deemed beyond economical repair and will be scrapped.The root cause of the issue could not be determined.This issue will be monitored for any increase in occurrence.If the occurrence of this issue increases significantly, additional investigative action will be taken.E4 is unknown, no information provided to date.
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