I am looking for a manual for a VWR freezer that we aquired. The model number is 5705 and it is a -80 degree freezer.

In general, when the conditioned space is close to the desired temp, usually about +10 degrees, is where I would start checking as most freezers are about 0 to -10 degrees. I would look for a super heat 6-8 degrees and nothing less than 4 just before unit shuts off. This is usually the most common numbers used for most all freezers. Good luck!

Hello Lasondra, that's a great question!

I have successfully located the Owner's Guide of your Frigidaire freezer, FFU1464FW1. I hope this information helps to some degree. If there is anything else that I can help you with, please feel free to reconnect! - Z
Frigidaire Manual Search Results

Try seaching on the internet for" 'your model' manual" (ie "???? manual" where ???? is to substituted for the actual model number of your freezer. You could also try the manufacturer's website.
or search directly on eg http://kitchen.manualsonline.com/manuals/device/freezer.html
I am sorry I can't be of help without the model number, often on the 'rating plate', a small metal sheet, which is itself often inside the freezer attached to the left wall as you look into it.

what is your model number is then we can get started then

http://www.searspartsdirect.com/partsdirect/part-number/Frigidaire-Parts/Freezer-Parts/297216600/0046/253/Model-LFFH2067DW7/1428/0142000?keySuffixId=NA&productTypeId=0142000&searchModelNumber=LFFH2067DW7&subCompDesc=System&brandDesc=FRIGIDAIRE&modelDesc=FREEZER&blt=11
Thermostat is what I would suspect first.

The defrost timer is the next suspect : http://www.searspartsdirect.com/partsdirect/part-number/Frigidaire-Parts/Freezer-Parts/297216600/0046/253/Model-LFFH2067DW7/1428/0142000?keySuffixId=NA&productTypeId=0142000&searchModelNumber=LFFH2067DW7&subCompDesc=System&brandDesc=FRIGIDAIRE&modelDesc=FREEZER&blt=11

I think the defrost heater is probably okay and it is just getting the wrong signals from the above components. But it is item 14 on this diagram: http://www.searspartsdirect.com/partsdirect/part-model/Frigidaire-Parts/Freezer-Parts/Model-LFFH2067DW7/1428/0142000/R0805140/00003

Dirty condenser, condenser fan motor is not running, freezer overpacked, bad thermostat, evaporator ice build up and it blocks the air flow. evaporator fan motor is not running or sealed system problem.

If your chest freezer is less than 50 years old, it does not have a fan. Cooling coils contact inner walls of freezer compartment, warm coils dissipate heat through outside walls of freezer. If compressor runs, temp is 30+ degrees, gasket is OK, lid not left open, then you have one of two contions: 1. Low capacity compressor 2. Refrigerant leak. Solution to either is to replace freezer. (My opinion: Don't get a Kenmore brand, which generally ties you into poor warranty and slow and poor service.) No matter what brand name is on the freezer, it is most likely manufactured by Electrolux (in St. Cloud, MN) or Haier (from China). Look at the model / serial number plate before purchase to see where it was manufactured. Yes, the USA manufactured ones are better. (and I'm not just saying that because the plant is less than 15 miles from where I am sitting right now)

Correct temperature for residential freezer for food is zero degrees Fahrenheit

I assume there is no manual control for setting temp. so the thermal sensor or control circuit has failed and it is just staying at its maximum.  You will probably get more help from the manufacturer but their website is somewhat disjointed; looking for contact info for your product ends at one point and then shifts to their scientific product line.
The only general contact info I found is here:
Nor-Lake 
You will in any case need to have the correct model number at hand since the subject line doesn't sound like your freezer. 

They are usually mounted on the front panel of the evaporator or mounted on the wall behind the evaporator.There is a possibility that the temp. control is at the condenser,and the sensing bulb was slipped thru the wall.Look for the bulb at the back of the evaporator and follow the cap tube.