Does 90v cause a refrigerator to ruin in just a 4hr period?

A refrigerator designed to operate at standard voltages (usually around 110-120V in North America or 220-240V in other regions) may experience issues if supplied with only 90V. While it might not immediately ruin the appliance, prolonged operation at such a low voltage can lead to inefficient cooling, increased wear on the compressor, and potential overheating. Over a 4-hour period, it could cause damage, depending on the specific model and its tolerance to voltage fluctuations. It's best to avoid operating appliances outside their specified voltage range to ensure longevity and proper function.