How cold is the freezer compartment on you RV refrigerator? My Norcold 2118 has been on continuously for about 5 weeks with the control set on 6; half the time on gas, half on electric. The coldest temp in the freezer has been 9 degrees; I would like it to be colder; ice cream is too soft. If I turn the control colder, the Refrigerator compartment freezes. I can't find anything that regulates the temperature between the two compartments.