Summer heat as well as humidity may be too much for your air conditioner, primarily if it has not been correctly tested. When your a/c method is not functioning correctly, it may always be running due to a frozen evaporator coil, dirty coils, clogged filters, leaking refrigerant, faulty controls, blower fan, motor complications, or because it's sized wrong. Your a/c may run continuously without shutting off when the thermostat reaches the set temperature because of all of these troubles. That's why your freezing office has most people wearing overcoats. Check your Heating, Ventilation and A/C method with a professional to determine the cause of the problem. Cold offices are often caused by airflow complications when obstructing your ventilation system. Rodents or faulty replacement may have caused cracks or holes in the ducts. A buildup of dust as well as debris in the ducts can also cause the problem. An Heating, Ventilation and A/C professional should inspect them.