B3: date of event is unknown; no information has been provided to date.E1 - initial reporter phone: (b)(6).One device was received in good condition.Per visual inspection, the tank cover had visible cracks around screws.The complaint was confirmed.The most probable cause was the screws may have been tightened too much.The product's history records were reviewed and there were no non-conformances nor service-related issues that would have resulted in the reported complaint.The tank cover and gasket were replaced.Device works normally.The temperature was stable and in the range.
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