Summer is in full swing in Florida. We are now seeing temps in the high 90's. (the weather channel lies) My wife has noticed that the running temp of our 2001 A-6 is higher than we are used to. It reads 4/6ths on the guage. Which is 1 line past the 1/2 way mark. I am not sure if this is something to be alarmed over. Is this o.k.??