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TOPIC: Mobile home furnace rust

Mobile home furnace rust 11 years 2 months ago #10050

  • Scott Widick
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Hi Hippies,

Anyone else noticed that coleman furnaces in a manufactured homes seem to all have rust? Whats the defect causing it?
Condensation? lack of exhaust air flow?

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Monument, Castle Rock, Lone Tree, Pueblo,Clorado Springs
Last Edit: by Scott Widick.

Re: Mobile home furnace rust 11 years 2 months ago #10072

Judging from the water stains I would say it is a roof leak. All the rusted ones that I find are leaks at the metal flange/roof covering intersection or flange/ven pipe seal. The older models with a low arc roof, the wind makes the metal roof pop and bang as does the expansion and contraction. These furnaces are always directly below the thimble and any leak drops right on it.

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Ralph M Smith, CMI
Serving the Central NY area including the greater Syracuse area, Utica, Rome, Camden, Oneida, Hamilton and more.
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Re: Mobile home furnace rust 10 years 11 months ago #14392

I have to agree with Ralph. I see many of these too and they appear to coincide with an updated roof. I usually find significant water damage along the (usually nearby) ventilation stacks.

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