But it has not split so we just added a heat trace to alleviate the ongoing problem.The 55 deg F was for ambient temp.

What I have found is that in "general", for much of the south, AC units are not typically sized appropriately to be able to cool more than about 20 degrees ambient outdoor temperature.  

A surge of ambient energy flows though me is if I just won the lotto.

@Charisse Ryan; Minneapolis chiming in here (-52 wind chill)Step by step tutorial on how to deal with -34 ambient temperatures1.

Owners trying to rehab themselves often don't know little tricks such as adding a spoonful of dish soap to their mud to help eliminate air bubbles (and thereby, an additional coat), or that the process of coalescence in exterior paint is negatively affected by an ambient and/ or surface temperature below 50 degrees.Being from Cleveland, unfortunately I can't much help with the Milwaukee area.

The only thing my Honda doesn't have are those leather seats, ambient lighting, and the couple hundred horses.

As for mold, the indoor air was actually cleaner than the ambient outdoor air (how does that happen?).  

I now know that there's a certain ambient level of anxiety involved in living in an apartment, particularly a basement/ground-level apartment.

If you have water lines in an outside wall, and the unit is reaching ambient temps, that cold air will travel and freeze the pipes all the way up to the top.

The fact is, the most any AC can cool is approximately 20 degrees below ambient.