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Old 06-03-2011, 02:05 PM   #1
snfexpress
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Fantastic Fan Rain Sensor & CLR

Our Fantastic Fans started acting up today - they would open and then after a while, in humid conditions, would close. But, there was no rain, so why was this happening? Well, it turns out that the rain sensor, a strip of pc board with etchings on it, was corroded. This pc board is designed such that when water pools on it, it shorts out telling the fan to close. Well, ours were green with corrosion so with just a bit of humidity the circuit would complete making our fan something akin to a character in a horror movie - opening and closing at will.

The solution is to use some CLR and remove the corrosion. Now, all is good.


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Old 06-03-2011, 02:55 PM   #2
ole dude
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Good catch. Thanks for shareing.
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Old 06-03-2011, 02:56 PM   #3
bobsals
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Mike & Kat,,, Thanks for the tip!
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Old 06-03-2011, 03:13 PM   #4
Mudchief
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Thanks for the great tip.
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Old 06-03-2011, 04:05 PM   #5
Ishler
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Considering that the copper on a circuit board isn't too thick I wonder if plating it with something that wouldn't corrode would be advisable. Ideally something passive like gold would be ideal but there must be something else?
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Old 06-03-2011, 04:26 PM   #6
MBeaubien
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Don't they have a lifetime warranty ? Someone told me that they do...???
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Old 06-03-2011, 04:28 PM   #7
Ozz
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Good job!
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Old 06-03-2011, 05:08 PM   #8
sfish
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Thanks I have wondered how those sensors worked.
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