One equator convective warming device was returned for analysis.Wear was found to the top and bottom of the enclosures upon visual inspection.The membrane switch, control board, mains board, and distribution cable were all noted to be outdated.The test hose was attached, the line cord was plugged in, the on button was pushed and high was selected on the keyboard; confirming complaint.Based on the evidence, the root cause is found to be due to a design issue as the impeller was observed to be grinding on the inside of the plenum.
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