Rule out schedules and normal control
Check timers, weekly schedules, sleep modes, occupancy controls and app settings. Confirm the requested temperature is meaningfully different from the room temperature and that another controller is not changing the command.
Modern inverter equipment varies its output and may stop when little capacity is needed. Record the run time and room temperature rather than assuming every pause is abnormal.
Signs that point to a fault
Repeated starts and stops over very short periods, warning lights, error codes, poor airflow or a failure to restart can indicate a control, sensor, airflow, electrical or refrigeration issue. Outdoor-unit protection may also stop operation when a fault is detected.
If the circuit breaker or protective device trips, do not keep resetting it. A qualified person should establish why protection operated. Burning smells, heat damage or unusual electrical noise require the affected system to be isolated safely.
Give the engineer a useful timeline
Note how long the unit runs, the selected mode and temperature, any displayed code and whether other indoor units are affected. Mention recent power cuts, cleaning, building work or changes to schedules.
Top Local can investigate intermittent systems across Kent. Because the problem may not appear continuously, videos and an accurate sequence can save time while proper testing confirms the cause.