Mitsubishi Heavy Industries · Packaged Air Conditioners
If your air conditioner is not cooling or heating effectively, it could be due to the air heat exchanger being clogged with dust or foreign objects, which restricts crucial airflow.
Click steps to track your progress.
Ensure the air filter is clean; a dirty filter can indirectly cause the heat exchanger to clog.
Visually inspect the air inflow side of the heat exchanger for any visible dirt or obstructions.
If visible and safely accessible, carefully clean the accessible parts of the heat exchanger fins with a soft brush or vacuum (ensure power is off).
If performance does not improve after cleaning, contact a technician as gas leakage or other internal issues might be present.