My true Model: GDM-12 temperature fluctuates too much. It goes from 34 degrees to 52 degrees. My bottles end up with condensation on them, then mold will appear on the labels of the bottles. How can I fix this temp swing?

Check and clean the condenser, set thermostat to 3 or 4. If still problem persists, change thermostat.

True GDM-12 Refrigerator... Repair Questions - Fixya

www.fixya.com/support/p22955-true_gdm_12_refrigerator_commercial
Recent True GDM-12 Refrigerator Commercial questions, problems & answers. ...Where is the temp control on the older (14 yrs or so) on GMD-12? True ..

Usually a blocked condenser fooling the thermostat into running overtime. Possibly thermostat fault but less likely

you should check the condensor first make sure it is not dirty. Inside and outside fan works.

Is it very hot out side the unit.recharging may not hurt is it cleaned the lint could be trapping the radiator were the coolan goes through to cool down try cleanning underneath before recharging

All refrigeration equipment has some sort of temperature control, either a temperature control knob(1,2,3,4 or A,B,C,D settings) or the unit has a pressure control to control the box temperature. The pressure control would be in the bottom of the case with the compressor.

check the coindenser coil underneith ther unit for a dirty condenser coil

It is more than likely that you are out of a refrigerant called R-22 hopefully that is all it is however the more expensive problem may be the compressor I had a problem with a kenmore refrigerator where the coils on the unit froze up I unplugged it for about 6 hours at room temperature about 70 degrees farenheit and it solved my problem however the general public cannot obtain R-22 you can buy the compressor and install it but the system must be relieved of freon (if any remains) it will save you time which is money when it comes to air conditioning techs the only thing they will have to do is fill the system up with R-22 good luck!

assuming fridge is at correct temp, i suspect fault is with your humidity detector. the humidity inside a fridge is a lot less than the outside air