Condenser technology has evolved dramatically over the past 10 to 15 years. Designs have changed from a round “tube and fin” design to a flat tube design, which improves efficiency. Four Seasons employs the latest technology developments from the O.E., including micro and mini-micro-extruded tubes. These new tube designs cannot be flushed successfully because of the small passages. Don't take a chance with flushing. Always replace the condenser when a compressor fails to ensure the A/C system doesn't quickly become contaminated again.
The image above shows a cross section of early and late design condenser flat tubes (a penny is used to show actual size).