If you are paying rent to someone you are paying in most cases for heating/air conditioning that is in working order. When the unit breaks it is the landlord who is responsible and I'm sorry but that is not the same as a power outage. One can be taken care of by the landlord, the other cannot. Was there only one repairman in the entire state on call that night? Wouldn't it be reasonable to say that when the first tech wouldn't come out that another one should have been found that night?