Wine refrigerator fan does not work

It might be caused from a broken evaporator.Or from ice being build up on the fan.

temp too cold and door seal not effective are 2 reason for this
48 F is too cold for wines (8.8 C) and continually opening and closing of the door allows humidity into the cabinet that results in frost and ice

Are any of the heat sinks (Those large aluminum blocks that the fans are attached to) getting cold?

Since this unit doesn't use a compressor, the only moving parts are the whisper fans inside of it that circulate the air. One of those fans may be going bad. If you are handy you can remove the back to see if all the fans are working but your best bet is to use the one year warranty and have a qualified techncian figure it out.

What is the model number of your unit?

Yep...no freon. My thermoelectric disc was blown. Replaced for $6 from Ebay. Let me know if you want step by step instructions with pics.

check for either a bad evap fan motor or a bad fan delay. It could be an under charged freon level too, but I would check the other items first as they usually go bad more frequently.

when coil gets hot fan sould come on to cool coil

the motor could be defective or it could be low o refrigerant causing the pressure switch to not kick on the fan. Could even be wires have come loose from the fan. If the fan does not work it won't cool. however it mould most likely cosy you more to fix if you take it to a shop to have it repaired if you have the tools to test it with I can help you so let me know if you have a test meter volt ohm meter and I can tell you how to test the system.

usually bad power supply, if the cooling fan isn't running either. These are horribly inefficient coolers that use a lot of power to accomplish little cooling. The power supplies are quite notorious to burn up.

If your supply is 12vdc output, you might be able to replace it with a supply from radio shack. dont use a battery charger though.