Why is my air conditioner running when the house is below the set temperature?
It sounds like the system is not actually "cooling". It sounds like it trying to dehumidify. An A/C system actually is a dehumidifier by its design. If the Temp of the residence is satisfied, and the A/C is still running, try turning up the humidistat higher. if the system turns off and returns to normal, then that is the issue. if it keeps running, then you will need to call a tech to come look at the system.