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Do upright freezers have a thermal shut off switch if the compressor runs too long or gets to hot?
There is probably a safety device of some description incorporated into the design though it probably isn't to blame for the trouble.
You need to discover whether it is the fan, compressor or both; neither should run constantly. The condenser fan is only needed while the compressor is pushing the refrigerant around the circuit and in many designs, where a belt driven compressor is used it is usual for the fan to be mounted on the extended motor shaft so they can't run independently.
If the compressor runs constantly and the cabinet doesn't suffer from excessive freezing it is almost certain either the compressor is failing or there is a leak and refrigerant is being lost - probably the latter.
on Jun 13, 2019
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