Warning: modern fridges use FLAMMABLE GAS as the coolant.
If you attempt repairs and break the copper piping, the gas will escape and mix with the air.
TURN OFF ALL GAS FLAMES AND ALL ELECTRICAL ITEMS BEFORE STARTING.
You have been warned.
If you are ham-fisted,stupid, or both, and you don't want to win a Darwin award by your fridge becoming a flamethrower/bomb, then get a professional repair person to fix it.