An air conditioner that consistently runs for about ten minutes before shutting down prematurely is exhibiting classic symptoms of short cycling. This behavior is typically caused by a restricted airflow issue, such as a heavily clogged air filter or blocked return vents, which causes the evaporator coils to drop below freezing, form ice, and force a thermal shutdown. Another frequent cause is an oversized cooling system that blasts too much cold air into the immediate area around the thermostat, satisfying the temperature sensor far too quickly before the rest of the house is cooled or dehumidified. Electrical problems, such as a weakening run capacitor overheating and tripping its internal overload protector, or a malfunctioning thermostat sending erratic signals, can also cause the system to halt its cooling cycle abruptly.
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