Fan noise

I have a newly restored Vendo 63.  Once I plugged it in the compressor made a lot of noise.  I called the guy that restored it and he replaced the unit and now the compressor is not making any noise.  Now the problem is that the fan seems loud. (I'm really not high maintenance)  I noticed on the new unit that he didn't put the black cardboard skirt? That goes around the fan to the coils.  Would this help cut down on the noise of the fan?  ( the fan is not tinging it just sounds like a normal fan blowing but it sound like one of the two footers you use on a bedroom at night.) Also, on the bottom part of the unit there is a three-prong plug that is plugged into a two-prong receptacle near the compressor.  Is there any danger in this?  Should I go buy an adaptor at the hardware store?  Lastly, the fan near the compressor never seems to turn off.  I had it plugged in for about 5 hours and the fan never shut off.  On my other unit it seemed that once the unit cooled off the fan on the bottom along with the noisy compressor would shut off.  Anyone have any answers?

[collecture]

I don't own a Vendo 63, but I wouldn't think that it is any different than other cooling assemblies that I am familiar with. The fan should have a fan shroud as this concentrates the draw of the fan through the condenser thereby improving performance. It is not necessary though for functionality. If the 3-prong plug is not seated fully in the socket, then I would get an adapter or replace the compressor line cord with a two prong plug cord. And once the cooler reaches the set temperature, the compressor and condenser fan should cut off. The evaporator fan inside the unit should run continuously circulating the air inside. Once the temperature inside rises above the value set by the thermostat, the compressor and condensor fan should kick back on to cool it back down to the set temperature.

[MoonDawg]

Noisy fan is usually worn bearings. If the fanshaft moves forward and back when you move the fanblade, you likely have an old motor painted to look nice.  Check also a for bent fanblade.

[sodaworks]

You can replace the fan for about 30 bucks and a blade will run about 10 bucks. '>

[bcharlton]

I would replace the fan as well.  I have gone through a few of them.
Brian C