3400RL insulation

[CMP]

We have an 05 we bought new and it has the artic package with 2 ac's. The problem is it doesn't cool all that well( but we manage) and the furnace runs almost continually in the winter season. We live in southeast Texas so it is not all that cold. When the furnace is turned down at night to around 57 and it is 40 outside the unit doesn't hold the temp very long before it recycles again. The trailer just doesn't hold any temperature very long. Does anyone else have this problem?