Performed a/c membership visit. Found a/c to be working when I arrived. Condenser coil was very restricted with cotton causing poor airflow through condenser. Cleaned condenser coil with water and chemicals. Turned system back on and checked electrical components, checked amp draws of compressor and fan motor, checked refrigerant levels, checked air temp entering vs leaving condenser. Everything checked out good. A/C system is 22 years old. Compressor is getting weak in unit but is still functioning. Recommend replacing system soon. Recommend keeping air filter and condenser coil clean.