It would cost about $40,000 to replace the fins, as they would have to be custom wound by hand after the old were removed.
You could have the coil part of the outdoor unit replaced. However, it would be better to just replace the outside unit as you have to tear it apart and gamble on the repair not causing other problems.
Who told you to use the pressure washer? It wasn’t from here.
http://www.heatpro.info heat/cool right-sizing
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