Got AC and Furnace installed for both my parents' house and my own house 3 years ago.
My parents' AC could not reach the set temperature from very beginning, called in the first year, service person came, added Freon, a bit better but still hard to cool down quickly, temperature never reached 25 degree.
This is the third year, AC kept running 2 hours on Monday Jun 18, 2018. Indoor temperature is still 29.5 degrees! The temperature was 30 degree before turn on the AC, so in 2 hours AC running, only 0.5 degree dropped inside.
Now we need to pay for the labor fees, have to get it fixed as soon as possible, I'm wondering if the service person really found the AC issue, it was brand new Carrier AC.