One device was received for investigation.
The device was received without the hose or power supply.
A review of the device history record, for the reported serial number, found that the device had been received in the past for repairs and was originally used as a demonstration device.
Visual inspection found that the device and filter were in good condition.
During functional testing, a known good hose and power cord were attached to the warming device and the unit was plugged in.
The device performed its self-test with no issues observed.
The device was set to each of its three different temperature settings; all temperatures were found within specification.
The temperature was then measured while the device was 75% and 100% occluded; the device passed both tests.
The warming device was forced into over and under temperature and at each temperature setting; the device passed all tests.
During all three forced overheating simulations, the alarm sounded and the warming device shut itself off within temperature specifications.
The device was then set to each of its three different temperature settings for an extended period of time; all temperatures remained within specification.
As the returned device operated in specification, no evidence was found to suggest the reported event was related to an intrinsic product fault.
(b)(4).
Please note, investigation results for mfr# 2183502-2016-01656 was originally submitted under mfr#: 2183502-2016-01655.
Supplemental report sent to correct error.
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