Upright freezer problem

An ice build up around the top of the door aperture isn't unusual due to some cold dense air from inside will spill out when the door is opened to be replaced with humid lighter outside air that will tend to remain at the top for a while.

Being frost free doesn't exclude it from this type of ice build up as only ice formed over the evaporator during a cooling cycle will be melted by the defrost heater.

Persistent localised ice build up could be a sign of failing insulation but this will be marked by a cold spot on the outside of the cabinet.

you can use superglue/bread mixer.

is the top of the freezer full where it can breathe remove something to help it breathe

put torch inside at night turn off lights if you see any light from inside seal is leaking.Adjust hinges to repair

Hello, get a short piece of electrical wire and strip the insulation off. put a bend in one end and then hang it over the heater directly above the drain making sure the wire runs into the drain about an inch. the heat from the heater will make sure the drain stays clear. Hope this helps. Mike

The cause if no defrost cycle , remove the panel where the ice is and derost with unit unplugged , use a hairdryer or similar to defrost ice , make sure its all defrosted , check the heater under that coil to make sure its still intact.
Also check the defrost timer , there may be a wiring diagram on the back showing where this is located.
Phil

The door seal is at fault. Regardless of the small tear it is not sealing well.
Take a dollar bill and close it in the door. Then pull on the bill to feel resistance.
You will find it pulls easily in some place. That is where your air leak is that is causing the condensation.
Do this about every 6 inches all the way around the seal.

You said you checked the seal but one thing you can try to be double sure the seal is tight put a thin layer of vaseline along the entire seal it will fill in any gaps and you can be sure it is sealing completely.

you could have a freon leak allowing the pipes to freeze up

Not sealing. warm air hitting cold air causing frost. also, door frame heater may not be working. most frames are "warm" to the touch. normally called an "anti sweat" heater.