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    donoreo Posts: 1, Reputation: 1
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    Feb 20, 2010, 09:02 AM
    Concord 90 plus furnace, open pressure switch error
    I just replace filter, checked air passages, checked hoses. Still getting a 3 light error. The blower kicks on but the glow plug will not glow and the systems times out then goes to 3 light error. I can blow into orange tube and here the switch click. Is the switch defective? Or is it something else.

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