We have a Domeftic refrigerator with a thermistor to regulate temp. The thermistor is in the highest position on the cooling fin ,but I can only maintain 40-44 degrees. Outside temp is 90 degrees and ...
Check the ventilating fan behind the refrigerator. Add more fans as needed.
Check the insulation at the top and sides of the refrigerator. Add insulation as needed and tape to keep outdoor air away from the refrigerator cabinet.
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