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Old 09-05-2018, 04:29 PM   #1
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Bimetallic corrosion?

These bumps appeared between our door and kitchen window. Is this something anyone else has seen? 3 months out of warranty will FR fix this?
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Old 09-05-2018, 07:17 PM   #2
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Have you opened up one of the "bumps" to see what it actually is?
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Old 09-05-2018, 07:18 PM   #3
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That right there is a sign of water infiltration. Those little bumps are from the glue behind the paper getting wet and expanding.
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Old 09-05-2018, 07:58 PM   #4
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Quote:
Originally Posted by AudiDudi View Post
Have you opened up one of the "bumps" to see what it actually is?
No I haven’t. I don’t really want to cut the wall covering open. May not have much choice.
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Old 09-05-2018, 08:02 PM   #5
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I park it inside my barn out of the weather. And haven’t had any signs of water damage anywhere else.
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Old 09-05-2018, 08:04 PM   #6
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Check around the kitchen window and the door for leaks. Sorry to say but it is definitely water. Also, check the roof seals. If you pick at them, you'll just wreck the wallpaper.
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Old 09-05-2018, 08:06 PM   #7
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We had a Holiday Rambler MH that the fuel gauge wire came off, and I knew nothing about something called " Galvanic corrosion ", Until I took it in to the shop, they found parts of the door, side of the MH starting to rust even the aluminum was getting corroded. Mine appeared like yours under the decals first..

So might check to see if any loose grounds or wires or if any instrumentation has stopped working recently.
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Old 09-06-2018, 08:47 PM   #8
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Here is a picture of the back wall in our flagstaff fifth wheel from a few years ago. Water was getting in through the windowClick image for larger version

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Old 09-06-2018, 09:14 PM   #9
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I received a reply from FR warranty mgr today saying it looked like the window seal was allowing water in. They would honor and fix it under warranty! They’ll also repair internal panel and wall covering.Thanks for the replies folks!
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Old 09-07-2018, 05:09 AM   #10
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Anytime.
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Old 09-07-2018, 05:19 AM   #11
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You would have to metal for it to be galvanic corrosion. Interior walls are not typically made of metal.

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