12V Colman cooler not cooling

Sounds like it's time to replace that silver condencer?
I've have had a 12v in awhile last time I bought one I went with a koolatron I found that they were far more superior.
Coleman's used to be really good , not so much anymore.
You might be able to find the parts you for your Coleman at a TA they use to carry most of them on their shelfs.
With both you also have to defrost them from time to time either by taking a small screw driver or something and chisle the ice of the condenser or unplug it let it melt.
If you don't it will create the problem your having.

 

Parts are cheaper

 

The fan blade is only about 6 bucks.
Like I said it's been awhile since I had one but I do remember replacing the motor for around 20 bucks.

 

If the cold plate is freezing but the cooler isn't cool, your fan isn't blowing hard enough.

 

If it's the kind where there are 2 seperate fans instead of the old style where there was 1 with an inside and outside shaft, you can buy a computer cpu fan at Best Buy...they last as good as the original, and you can buy a larger size if needed.