Why Does My Split AC Compressor Trip After 10 to 15 Minutes, But My Indoor Unit Fan Is Still Running?

If you're experiencing an issue where your split AC compressor trips after 10 to 15 minutes while your indoor fan continues to run, there are several potential causes to consider. Properly diagnosing and addressing these issues can save you from costly repairs and ensure your system operates efficiently.

Causes and Solutions

There are a number of reasons why a split AC compressor might trip after a short period of operation. Here are the most common causes and solutions:

Overheating

One of the most common reasons for compressor trips is overheating. This can occur due to:

Inadequate airflow A dirty air filter A blocked condenser coil

When the compressor overheats, it activates the thermal overload protection mechanism, causing the compressor to shut off for a period to prevent damage.

Recommended Actions:

Check and clean the air filters to ensure proper airflow. Inspect and clean the outdoor unit, focusing on the condenser coils.

Refrigerant Issues

Refrigerant-related issues can also cause the compressor to trip, especially if there is:

A leak causing low refrigerant levels Excessive refrigerant leading to system imbalance

These conditions can lead to the compressor working harder and eventually tripping due to overheating.

Recommended Actions:

Check the refrigerant levels with the help of a professional. Fix any leaks that may have occurred.

Electrical Problems

Electrical malfunctions can also cause the compressor to trip. These issues can include:

Malfunctioning wiring Faulty capacitors Issues with the compressor relay

These problems can cause the compressor to fail under load, leading to trips.

Recommended Actions:

Inspect the wiring and capacitors for any signs of damage. Check and replace any faulty compressor relays.

Faulty Compressor

Occasionally, the compressor itself may be faulty or damaged, leading to internal faults that cause it to trip.

Recommended Actions:

Replace the faulty compressor if necessary.

Thermostat Issues

If the thermostat is malfunctioning, it may not accurately sense the temperature, causing the compressor to cycle improperly.

Recommended Actions:

Replace any faulty thermostats.

Blocked Drain Line

A clogged drain line can cause water to back up and trigger a safety switch, which in turn can trip the compressor.

Recommended Actions:

Check and clean the drain line to prevent water buildup.

High Pressure

If the AC system is experiencing high pressure due to a clogged filter or coil, the high-pressure switch may trip the compressor to prevent further damage.

Recommended Actions:

Check the filter and coil for any blockages.

Conclusion

Addressing these issues promptly can help prevent further damage to your AC system and restore its efficiency. Regular maintenance and inspections are crucial for keeping your split AC system in good working condition.

Recommended Readings

Understanding AC Repair Reasons Energy Star Guidelines for Air Conditioners Diagnosing a Split Air Conditioner Compressor Trip