Manufacturing device history record 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.A product sample was received for evaluation.Visual and functional testing were performed.Visual inspection found broken light-emitting diodes (led), cracked front cover, and dirty heater assembly.Wear and tear damaged line cord.Functional testing found the over temp alarm keeps going off confirming the customer complaint - alarm was out of calibration and the potentiometer (pot) used to set it was unresponsive to adjustments.Replaced the printed circuit board (pcb), heater assembly, front cover, and line cord.The device passed all functional testing.The root cause of the reported issue was found to be component failure.D5 and e4 are unknown, no information provided to date.
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