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Help diagnose LTQ70 soldering iron no heat

Discussion in 'Troubleshooting and Repair' started by mikey5791, Oct 30, 2020.

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  1. mikey5791


    Jun 7, 2013
    Hi forum friends,
    Once again i come to this forum for assistance. In the past, i have been getting a generous amount of help in repairing and appreciate it so much.
    This morning i found out this soldering iron no more producing any heat, but the neon light is on. I pressed the button to heat up to the hotter 70w setting and it still no heat. It has a normal setting of 30w, but another higher setting at 70w if i press that orange color switch.
    I opened up the casing but found nothing burned or melted. Can anyone point me to where should i start looking and testing where is the fault.
    Thank you.

    Attached Files:

  2. Harald Kapp

    Harald Kapp Moderator Moderator

    Nov 17, 2011
    Check the resistance of the heating element with an Ohmmeter. The heating element's wire can break after long use. I had to replace my old soldering iron recently for exactly this reason.
    It is unlikely that you will find an affordable replacement heating element. I guess you're in for a new soldering iron.
  3. Martaine2005


    May 12, 2015
    The neon will light, it’s connected across the mains input.

  4. mikey5791


    Jun 7, 2013
    Thanks for reply.
    I am ordering a new set of temperature adjustable soldering iron soon.
    Hope it will be useful for many tasks ahead.
    Martaine2005 likes this.
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