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  1. #1

    Question HELP: Weird Temp Issues

    All of a sudden when I try and start a print, after 10 seconds after starting the first layer the extruder temp flashes a negative number quick than goes undefined, BUT it will preheat at those same temps for a long time without erroring...

    my printer had a melzi 2.0 red board in it

    video: https://photos.app.goo.gl/wKOcFyhE5CVSAzlM2

  2. #2
    Technologist Roberts_Clif's Avatar
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    It sound like your thermister is shorting out on the Heater Block. The thermister should be pushed all the way into the temp hole, including the Teflon thermal tubing.
    Each Teflon tubing should be placed one on both sides if the retainer screw with washer, forming a Y around the retainer screw. This keeps the thermister in place without shorting out.

  3. #3
    Quote Originally Posted by Roberts_Clif View Post
    It sound like your thermister is shorting out on the Heater Block. The thermister should be pushed all the way into the temp hole, including the Teflon thermal tubing.
    Each Teflon tubing should be placed one on both sides if the retainer screw with washer, forming a Y around the retainer screw. This keeps the thermister in place without shorting out.
    You're right, it was shorting out! I got a weird one that is kind of cemented in place, will have to replace the block. Thank you!

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