pressure switch open with inducer on

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    Can't find reason for furnace pressure switch error and lockout

    First post, but have tried everything else I could find with no solution, so here goes. We have a Ducane 95G1UH/DF Propane Furnace. Installed in 2015 and no real issues since then. Recently, the furnace works fine, but the indicator light gives three flashes. After 12 minutes or so, the...
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