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How do I clean the inside of a domestic air conditioner? Can I spray water to the coil (after the filters are off) or water will make coil to get rust?

  • i have an air conditioner that was salvaged from a flooded basement. completely flooded. i got it about 10 years ago, have used it about 6 summers, and it still works. make sure it's dry before you plug it back in and you should be golden. – dandavis May 23 at 21:24
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The coil gets water (condensate from the air) on it all the time in use, so putting water on it should not affect it. How effective that will be in cleaning it is another issue, and "where else you get water" while spraying it could be a problem, but as to your question, "No, the coil is perfectly fine being wet, happens all the time."

  • Thank you for your answer. Yes actually I am not sure if I asked it correctly. I just don't want to affect the refrigerant gas in any way. I mean I don't know how leaks are made in AC so that's why I am asking. After the filters are out. there is an iron thing. I will spray there as I don't have access anywhere else that I can clean. But before I do that, I would like to know if it's safe to do – JohnC May 23 at 14:33
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There are commercial spray cans of cleaning liquid for evaporator coils. I have used some and it seemed to work , but I do not remember the name. Our coil lasted 22+ years before apparently dying . Any coils I have seen are aluminum so they do not "rust".If you have red rust , it is coming from the galvanized steel water collection pan .

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