Evaluation results: one level 1 hotline low flow system was returned for investigation in used condition.Visual inspection revealed that the float switch was stained red, the pcb power switch and retainer required an upgrade, the enclosure was stained and marked.The front cover and reservoir cover were both cracked, the line cord was worn and the pole clamp was damaged.The investigator subsequently filled the tank with water, attached a temperature fixture, plugged in the line cord, and turned on the power switch.The customer reported product problem (failure to power on) was confirmed during testing.The product problem occurred because of a defective pcb and power switch.The device history record was reviewed and showed that this device met all manufacturing specification for product released for distribution.No issues were identified that would have impacted this event.The problem source of the reported product problem was a design issue.This was established as the root cause.The outdated pcb was replaced in order to correct the problem.
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