I have a new unit that is 1 year old. Today the house want seem to cool. Air coming from vents feel cool but the thermostat want drop below 79. The compressor is blowing warm air out side. I notice that the copper line has a good bit of condensation next to the unit. I also changed the batteries on the thermostat today. I am looking at getting a programmable thermostat which one should I get.

Thanks for the help.
Kevin