Why does my house a/c works and cools one day but not the next?

Question

Why does my house a/c works and cools one day but not the next?

Answer 1

The source of heat is actually the house and on some days the UV exposure is worse than others.

A/C is really refrigeration and should tell you there is a design problem with the building. Solar radiation including the same UV that burns our skin is causing buildings to generate heat the building isn't designed, insulated or insured for.

Go to the following link and look at the temperature of different exterior paints and shade effect. This link shows the cause of atmospheric warming and the fact we are reacting to symptoms. http://www.thermoguy.com/globalwarming-h...

Answer 2

The temp outside falls, so the A/C won't come on? Does it have a programmable Thermostat?

Answer 3

It could be the humidity and it just seems cooler.  Otherwise, I would suspect something mechanical.