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Hi! My name is ***** ***** I can assist you with this. I may need some additional information from you first in order to give a complete answer.
If this a Lippert Components system? If so, which one as they have several models? I can tell you that the most common problem with temps that low is batteries that are failing to hold their charge and they are going to be near impossible to charge at those temps and can be easily frozen and ruined if they are discharged. Any way you can get them out and into a warmer environment so they can be charged and tested? Get back to me with this information and I can assist you further here. All follow ups are included in or fee. I will make a phone chat offer for you as well as that usually works best with diagnostic issues.