Vapor-compression refrigeration systems require the compressor to remain upright due to gravity-dependent oil lubrication: oil pools in the compressor sump and lubricates moving metal parts, so tilting the compressor causes oil to pool elsewhere and risks compressor seizure, requiring users to wait 2-24 hours after transport before operation.
causalpending
Evidence Quote
“The compressor housing forms an oil sump, and we rely on gravity to keep that oil pooled in the bottom of the sump... you need to let these sit upright for at least a few hours before you switch them on so any oil that might have gone somewhere it shouldn't can drain back to the sump.”
Created: 8/13/2026, 9:53:39 AM
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