Just turned on my AC for a little relief from the summer-like heat and thunderstorms... and the air is cool coming from the vents (though seems to be trickling from some and strong from others) -- but the thermostat now shows that the house is warmer then before. It has risen from 72 degrees to 75 degrees. Any idea what causes this? What I should do?
Thanks!!

See if outside unit is on, If outside Breaker is tripped or off, it will not cool.
Do you feel warm air blowing up from outside unit? You shoud have while inside unit will be cooling.

Thanks for the help!
I checked the breaker and it seems to be on... and the outside unit is on and air is blowing up from it.

What is the temperature at a discharge register in your house?