Qn#: (b)(4).The sample was returned for evaluation.A visual exam was performed and it was observed that the power switch did illuminate when turned on, but the unit did not generate heat.Evaluation revealed that heater's circuit board was at fault.The component was inspected and did not present any visible defect, and dhr shows that the heater was operable and within specifications at the time of release.This is a random component failure, which is not often seen in this units, especially at this age (123 days approximately).The circuit board assembly was replaced and the heater was retested as per procedure and found to meet specifications.The unit is to be repaired and returned.
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