(b)(4).The sample was returned for evaluation.A visual exam was performed and no defects were observed.The components were assembled correctly.Functional testing was performed and the unit passed the testing.In addition, the unit was tested (heating) placing the potentiometer on the three positions: minimum, medium and maximum.It was observed that the unit does not heat in the three positions.The sample was opened (housing) and during the evaluation it was detected that the unit contains water residue in the sponge of the pcb card.It is not known why the unit contains water inside.Based on the investigation performed, the complaint was confirmed.Although the complaint was confirmed, a root cause for the issue could not be determined.It is not known why the sample contains water on the inside.This condition could contributed to the reported failure.All aquatherm heaters are 100% tested by manufacturing; therefore, it is unlikely that the issue found in the sample occurred during manufacturing.This defect would have been detected during the final inspection test.*a conclusion code could not be found as the complaint was confirmed; however, a root cause was not established.
|