Fridge is freezing things

If it is the same temperature as verified with a thermometer, first thing in the morning, at settings 1, 5, and 7, then the thermostat or the thermistor (temperature sensor) has failed. The ideal temperature for a home fridge is 4'C.

There are puzzles though, is 7 the coldest, or is 7 the warmest. Are you increasing the cold, or reducing the cold by setting it at 7? The manual is the only sure-fire way to tell, or sometimes they pot 'Coldest' on the dial. Google is your friend in such cases;

make model manual

probably will freeze as fridge settings get colder with the lower numbers
1 is close to freezing and 4 is probably where a fridge setting should be

one is the coldest setting
set it higher say about 1/2 the adjustment of the knob

Make sure the damper at the bottom of the refrigerator compartment is close. If not, close it but not all the way. A small flow of cold air from freezer will be necessary to maintain a temperature of at least 40 degrees in the refrigerator compartment.Adjust damper as needed and use a thermometer to measure temperature over a period of time.

1 is the warmest 5 the coldest,so you are overcooling your veg etc,use a fridge thermometer and run it at +5c.this is the most economical setting,and will keep your lettuce fresh not frozen.

If your veg is freezing you need to RAISE the temp in the fridge,if #7 is coldest,then #1 is warmest.SET IT TO #3.You should keep a fridge at +5C for best storage of CHILLED food.you should also adjust your fridge for summer and winter ambient temperatures.a fridge/FREEZER thermometer is ESSENTIAL.OTHERWISE YOUR WASTING MONEY/ENERGY.

fridge coldest setting is 1
freezer warmest setting is 1

First, clean it the unit out and fully defrost.  Clean the condenser coils.  Don't pack in so much food, don't open the door too frequently.  Never block any air channels. Never leave uncapped liquids in the fridge or freezer.  Set the fridge at about 40 degrees...use an outdoor thermometer.  Freezer at about 0-5F.