(b)(4).The device was returned for evaluation.An internal/external visual inspection was performed and the device passed.Rite (returned instrument test evaluation) electrical testing was conducted and the device passed.A short simulated therapy was completed with no issues found.The device failed temperature testing associated with rite functional testing.A service history review showed no failures/problems that were the same as, or similar to, the reported issue.In addition, there was no indication that the parts replaced during servicing caused or contributed to the reported issue.The cause of the condition could not be determined.The device was sent to be serviced.Should additional relevant information become available, a supplemental report will be submitted.
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