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20 yr old residential split system AC compressor
system is working fine and cooling fine.
there is a thermal protect switch on compressor that shuts if down when it gets to hot in the sun. there are of course fuses to protect from surges.
my question is - what can be done to ensure that compressor lasts alot longer. or is it something that really doesnt require anything, and when it decides to die, it dies.
also, how long does a compressor normally last (used only during summer)