AC Short Cycling: Why It Starts and Stops Too Often

Common causes of AC short cycling, including thermostat, airflow, electrical, frozen-coil, and system-sizing problems.

Short cycling means the system starts and stops more frequently than expected without completing a normal cooling cycle. That can reduce comfort and place additional stress on components.

Possible causes

• Thermostat placement or control issue
• Restricted airflow
• Frozen coil
• Electrical or control fault
• Equipment sizing mismatch

Because several different faults can produce the same symptom, recurring short cycling usually merits diagnosis. See AC repair.

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