Quote Originally Posted by mbarizona View Post
Nothing has changed besides air filters and in ceiling speakers. No trees removed, sun screens are on and clean.

I did have a hot water heater replaced, but it is on the opposite side of the house and in the garage. No duct work goes by it, no nothing.
The ceiling speakers could have caused an increase in the heatload.(?)
You could have caused some other problems in the attic area that you are not aware of.

I have not read enough of the posts, so will end my comments here.