A long day with scorching heat in Sterling, VA and all you need is an AC at home to avoid a sleepless, sweaty night. If you have turned on your AC but it is not cool, it is troublesome. The reasons why it is not cooling are- the thermostat is probably not correctly set. Change the temperature as required and enjoy. Or just check the air filter that is covered up with dust. A clean filter will ease the airflow and increase cooling capacity. Other reasons include frozen coil, damaged pump, etc. if there is anything else or you are unable to fix the problem call sterling HVAC repair services to avoid any further damage.