White residue on AC condenser fins


Old 03-21-03, 02:36 PM
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White residue on AC condenser fins

All of the condenser fins are covered by a white substance. A foaming coil cleaner does nothing. What is this stuff and will it affect the AC. So far the AC works fine.
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Old 03-22-03, 08:09 AM
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Can't say for sure, but if this coil has been cleaned before with an acid type cleaner it may not have been rinsed throughly. This does cause a white powderer looking substance from the metal being eaten away from the overdose of cleaner.
Old 03-27-03, 06:05 PM
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good question

i have wondered myself about this. as mentioned, coil cleaning will cause this, but i personally have seen many coils that have never been cleaned look like this. my guess is that oxidation caused by dissimilar metals (copper tubing, aluminum coil) may be causing this.

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