One device was returned for investigation.The returned sample was visually inspected, and the device was noted to have a cracked tank cover and an outdated printed circuit board (pcb) and power switch were noted.The investigator started with a visual inspection then filled tank with water, attached temp check, plugged in line cord, and turned on the power switch.Then ran on the safety/electrical test which it failed.To use the test to help diagnose the problem the main components are unplugged from the pcb one by one, and the test is run again each time a component is removed.The customer's complaint was confirmed, the device failed the safety/electrical test.In this case it was the heater that caused the failure.They were unable to determine the cause of the failure.No action taken due to the age and condition of the device.It was deemed beyond economical repair and will be scrapped.A manufacturing dhr review was not performed because the results of the complaint investigation do not indicate a problem with the manufacture of the device.No causes or potential causes of the customer's reported problem were found during the review of service and repair records.
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