Event methods, evaluation, and conclusion codes: updated.One warmer device was received for investigation.During visual inspection the device was observed to have the front enclosure was removed and the light emitting diode fell out.The reported issue was confirmed during functional testing when the device was powered on and the screen would only display a temperature of 71 degrees, and wouldn't adjust.The investigation traced the issue to the printed wire assembly and heater, which were determined to be faulty.However, the investigation could not identify a root cause for the components' condition.The printed wire assembly and heater were replaced.As no manufacturing root cause could be identified, no review of manufacturing device history records was conducted.A review of device confirmed this device has not been in for service in the previous 12 months.
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