A fridge works by drawing moist air by convection to a cold plate situated at the rear of the fridge.
For this reason you should never put strawberries in a fridge and you should always cover moist items ie:-
boiled ham etc or they will dry out.
The moisture in this air then condenses and settles in a sloping channel which has access through a small hole / tube to the rear exterior of the fridge where this moisture is evaporated into the surrounding atmosphere by the heat given off by the compressor.
Please answer the following question so that I can help you.
Does the flat plate at the back of the fridge feel cold ( The condensing plate )
Just below the evaporation plate there should be a sloping channel which has a hole at the bottom of the slope, which goes out of the back of the fridge sometimes into a tube which hangs down and allows water to drip into a tray on the top of the compressor, so that it evaporates into the surrounding atmosphere outside the fridge.
Is this hole clear, if the hole is blocked the fridge cannot function properly and water will accumulate in the sloping channels.
I have saved quite a few customers from throwing out perfectly good fridges when the only fault was that the condensing plate did not function properly because the drainage hole beneath it was blocked.
A fridge consists of a sealed pipe arrangement filled with a liquid is pumped by the compressor. If the compressor fails you need special equipment to pressurize the system and seal the pipework. In most domestic units if the compressor fails it is more costly to replace the unit than to buy another fridge,