The most common causes of Subaru AC compressor failure include:

  • condenser coils plugged by mud, dirt, or road debris, overheats refrigerant;

  • A dirty cabin filter restricting airflow through the evaporator coils causes the compressor to overheat.

  • A low refrigerant charge due to a leak causes the compressor to overheat.

  • A compressor oil leak causes compressor bearing failure.