Cannot reverse door on Electrolux fridge freezer

Check the back wall of the freezer, I would suspect the beginnings of or a full-on defrost failure... If there is frost on the back wall of the freezer it means the evaporator is blocked, disallowing airflow to the fridge compartment... Electrolux Refrigerator Defrost Thermostat 216731001 . If there is no blockage, but temps are still not cold enough, your Frigidaire may be leaking refrigerant...

probably the best idea is to contact a local fridge/ freezer person that replaces seals on the doors of fridges and freezers (yellow pages for a start-fridge repairers)
they have an assortment of seal profiles on board and they make the seal to suit the door on site
The cost is about 75% of new price
ask the service agent spares for a seal, because although the freezer may be old , seals didn't change all that much and you may still get a seal from them
From the size I am guessing that it is a chest freezer probably an electrolux/email product and you may be lucky if it is

the front feet under the door opening are adjustable screws. You may have to use a shifter to get them to move as they mat be rusted . adjust so the fridge slopes slightly to the rear. This keeps any moisture on the back wall to drain out the hole and the door will close if left open

Change thermostat .

to connecting arthin wires.

tilt unit backwards,and under hinge side you will see a bracket,undo bolts and transfer to opposite side leaving loose,slide door down ,then on top of door transfer plug to opposite side(if needed)slide door back up and refit bottom hinges/tighten bolts.
handle is just a matter of prising plastic cover of and unscrewing,then refitting to other side.
once you tip it backward its pretty obvious really.

Air from the freezer is blown into the fridge by a fan, some new type frigs have electronic controls that open and close a vent to frig. the older ones have two vents in the frig from the freezer and when covered with frost or ice the air will not reach the frig. check for ice or just defrost the freezer if there is ice or frost, also check for food or plastic over vents in freezer. Also check that the freezer fan is running as these sometimes become blocked or defective motor.

Just fixed a similar model from Electrolux. It's not the fan that was faulty, but its transformer on the pcb. The fan has its own pcb, a small one on the left side and is controlled via 230V from the main board. It's easy to remove, turn around and measure.

Try cleaning along seal and seal itself. If it does not work get new seal. The seal do go bad after a while.. If under warranty call dealer you purchased from for them to replace.

fully defrost it 48 hrs with the doors open and that can often cure it.