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-   -   Armstrong air ultra sx 80e furnace (https://www.askmehelpdesk.com/showthread.php?t=531888)

  • Dec 5, 2010, 01:20 PM
    haystackre
    Armstrong air ultra sx 80e furnace
    The flashing light says "limit switch open". I have cleaned the filters but the light still flashes 4 times. What do I do now?

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