Frosting up of the freezer. The fridge seems not to turn off

As far as your freezer frosting up, sounds like a door seal problem, run your fingers along the seam of the door seal, there should be no splits/holes in the seal.
As far as the refrigerator either there is a secondary fan motor, or there is a obstruction blocking the air movement, if the freezer has a bad seal, its suspect ice is still building up.

I’m happy to assist further over the phone at https://www.6ya.com/expert/robert_54ae41aaaffbab00

Is the fan in your freezer working? Make sure the door switch is pressed in when checking as it cuts the fan out when the door is open. Does it have a manual defrost timer?

Replace the "defrost thermostat" located on the coils in the freezer. Here is the part to order.

sounds like the fridge maybe short of gas. you will need an engineer to pressure test the gas.

change the timer

We have a Kenmore Coldspot Model # 106.8770687 and the freezer is cold and keeping things frozen, but seems to be frosting over and the refrigerator is warm at 40 to 50 degrees ... any help regarding what to check is helpful! Or a schematic / manual

i had the same problem recently with all my fridge food freezing up, this all seemed to start when i discovered the interior bulb blown i replaced it still nothing also noticed warning lights on front out,i could hear the motor going so i knew it was on i removed back cover and found the heater covered in ice it turned out it was the failure of the control board causing these problems had it replaced and working fine now hope this is of help dmb23

"Fan in freezer does not seem to be running"

This wiil cause it to frost up in the freezer and this fan is the only way to get cold air into the Fridge area.

hi. thanks for the question .You mean the freezer is frosting up. not the fridge . check the defrost timer. and termination switch. and defrost heater . one of those three parts has failed thanks the appliance doc

Liners are not able to be replaced. Will need to buy a new unit if the liner is a problem.