PSP - Problem Solving Parts Problem: "The new R4 compressor I just installed is noisy. What is the problem? " Four Seasons Manufactured R4's   19 New R4 compressors are now manufactured in our OS/ISO certified facility Quieter then current OE units Endurance tested equivalent to 50,000 miles Fleet tested under strenuous conditions 2 year or 24,000 mile warranty First class quality, coverage, technical support, training and customer service