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    lovebabies03's Avatar
    lovebabies03 Posts: 1, Reputation: 1
    New Member

    Feb 10, 2007, 02:23 PM
    Furnace is blinking 4 times saying open limit switch
    My furnace is blinking 4 times indicating that the furnace has an open limit switch. I changed the switch and it is still blinking 4 times indicating the same thing. What else could be wrong or what can I do to fix this problem? ITS COLD!!
    letmetellu's Avatar
    letmetellu Posts: 3,151, Reputation: 317
    Ultra Member

    Feb 10, 2007, 09:51 PM
    In the line going to the limit switch was there a little fuse, a small thing in the wire that looked like a small firecracker, it will be close to the limit?? That is a roll out fuse but works in line with the limit switch. And I am sure it would give the same 4 blinks. To check this you can use a short piece of wire to jumper around the fuse. If that is the problem DO NOT LEAVE THE WIRE ON AS A JUMPER TO MAKE THE FURNACE RUN. That is a safety fuse and there is something wrong or it would not have blown, it could have been a down draft or something similar but do not take the change.

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