I have a stand alone freezer model MFU17F3GW8 serial # WB11907298 my problem is that it does not get cold enough. what could be the problem?

There should be a fan inside circulating the air...

Possibly bad thermostat

This mentions ref/freezers but goes for both side by sides and just freezers alone:
This can be a tricky problem. There are three things that I can think of that can cause this. First is the defrost timer. To determine if this is the case look in the freezer at the freezer back wall. Is it cover completly with snow like ice? If so the timer is not letting the machine go into defrost. Also you should notice the fresh food part of the machine start to rise in temperature. The next thing is the machines cold control thermostat is faulty and even though the machine maybe cold enough the thermostat can't tell so it never kills power to the compressor. The last is that your machine is low on freon, so the freezer temperature never really gets low enough. Signs of this are decrease in ice maker production, ice cream softer than normal, or put a thermometer in t he freezer. The temperature should be around 0 degrees F and no more that 5 degrees F

If you need further help, I’m available over the phone at https://www.6ya.com/expert/jason_4570d45317834dd3

the dryer is already sock ,, you need to change it and refill the gas

call traulsen at 1-800-825-8220. Get tech support and give them the model and serial numbers. They will send you a diagram. Nothing on their web site.

It sounds like you may be on the right track here. If the gasket is old, hard, and brittle, it will allow moisture to be administered into the freezer, causing frost buildup. Not to mention, that old door gasket is leaking out a lot of cold air. Your best bet is to provide the model number (as you've shown here) and the serial number to an appliance parts store or authorized GE appliance parts outlet. They should be able to provide you with a brand new gasket. Removal and re-installation of the new gasket is fairly simple and you'll notice a big difference, not only in the lack of frost buildup on the inside of the freezer (especially in the summer) but you may even see a noted improvement on your electric bill as well!

I hope this helps and let me know if you need any further assistance! :)

First culprit could be a refrigerant leak and needs to be charged. If the evaporator is frozen solid it won't push enough sub zero air to freeze. Call a trusted ac&or repair man

Go to there website and see if you can find your model. You can also contact them from there.
http://www.aeg-electrolux.co.uk/node145.asp?CategoryID=2595

Also get yourself a stand alone fridge and freezer thermometer - leave it in for an hour -that will establish what the temperature really is which will help in diagnosing the cause.

Also trying unplugging it for 15 minutes so the display board loses power - then plug it back in - sometimes that will reset it.

i've pulled up the service diagram for it and there's no thermostat or temperature control but there's a limit sensor inside the freezer I'm sure that such sensor is failing and when it defrosts, it stays on to long, and the whole 15 min defrost cycles goes on causing the freezer to warm up, delaying the freezing process. I'm almost sure that the limit is going.

confirm your model number by getting it off the serial plate then go here http://www.boschappliances.com/site_tools/DocumentDisplay.aspx?menu_id=27&menulevel=0302&keyword=KGN33V00GB