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.  

Here in the east, with heat waves and humidity, it is common for most air conditioners to cool down between 10-20 degrees below the ambient air outside.

The tank heater wouldn't be actually connected and heating the water just letting it warm up in the warmer indoor ambient temperature.

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.

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

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

Have slightly better signage before the show - Showing my info on the screen is not possible with the ambient lightI will try these things over the next month before the next showing and compare the two.

What is true is that the colder the ambient outdoor temp is, the less efficient they become, so I've had electric bills in the $200-$350 range in the coldest months (far less than if I was trying to heat with electric resistance). https://www.mitsubishicomfort....

The service data sheet that came with the 10-year-old Hotpoint (GE) 18-cubic-foot top-mount no-frost in my house says that with the freezer knob at 5 (on a scale of 1 to 9) and the fresh-food knob (if equipped) at C, which is also the middle, you should have:70 F ambient: Fresh food 33-39 F, freezer -4 to +2 F, percent run time 26 to 36%90 F ambient: Fresh food 33-41 F, freezer -4 to +4 F, percent run time 40 to 56%The service data sheet that came with my 3-year-old Frigidaire (Electrolux) 18-cubic-foot top-mount no-frost at my rental says that with no load, the doors closed, and the controls set in the middle, you should have:65 F ambient: Fresh food 35-40 F, freezer +2 to +8 F, percent run time 25% to 35%90 F ambient: Fresh food 35-40 F, freezer 0 to +5 F, percent run time 45 to 55%Another rule of thumb I have heard is that if you have a box/tub of ice cream in the freezer, it should be soft enough that you can scoop it - not a solid block but not runny either.Like @Jennifer Rysdam and @Joe Splitrock said, cleaning the coils can help. 

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