Doser 2.1 sticking

Discussion in 'GHL Advanced Technology' started by Heneee11, Mar 4, 2018.

  1. Heneee11

    Heneee11 Member

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    One of the heads on my 2 month old doser is playing up. It tries to dose but nothing spins, I've taken the head apart and replaced the tubing, everything looks ok but still won't spin. Any ideas?
     
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  2. Brew12

    Brew12 Electrical Gru R2R Supporter R2R Excellence Award Reef Squad Leader Article Contributor Build Thread Contributor Partner Member 2018

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    I don't know, and I'm in the same boat. Doser is about that age and it spins about a 1/4 turn and just starts buzzing loudly. It will spin with the blue cover off until the rollers start coming out. Won't work while connected. :confused:

    Anyone know if there is a way to lubricate these things to make it work better?
     
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  3. Heneee11

    Heneee11 Member

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    In the end I took the rollers out washed, dried and replaced, still stuck. Tried it on the lowest speed and the roller seemed to catch on the blue cover, a little bit of manual moving of the blues cover and now seems to run ok. Must admit I am a little nervous using the head again,as it was dosing alk for me, luckily noticed it wasn't working after just one day.
     
  4. Brew12

    Brew12 Electrical Gru R2R Supporter R2R Excellence Award Reef Squad Leader Article Contributor Build Thread Contributor Partner Member 2018

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    I am only using 3 of the 4 heads so I took the unused rollers and cover and moved them to the problem one. I think I just wore it out faster than I expected. I think I'm going to have to add a Maxi doser for my Kalk.
     
  5. WWIII

    WWIII Valuable Member R2R Supporter R2R Excellence Award Build Thread Contributor LMAS Member

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    My brand new maxi doser is sticking as well. I can't even calibrate it as it sticks within a few seconds (both heads). Ive taken the heads off and tried to find the problem with no luck. I have an email in to GHL to hopefully get it figured out. There's plenty of lubrication in the heads/rollers. Just gonna have to wait to see what they say?
     
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  6. Whipples

    Whipples Well-Known Member R2R Supporter Build Thread Contributor

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    There were issues at one point with roller sizes and the blue caps on the 2.1, reach out to @Vinny@GHLUSA or @Marco@GHLUSA and they will set you right!

    If you take off the blue caps do you see any white residue in them? Like a powder? That would mean the rollers are too tight. If no, then it may be something more involved.
     
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  7. Brew12

    Brew12 Electrical Gru R2R Supporter R2R Excellence Award Reef Squad Leader Article Contributor Build Thread Contributor Partner Member 2018

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    I thought those problems were awhile ago. My unit isn't even 2 months old.
     
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  8. Whipples

    Whipples Well-Known Member R2R Supporter Build Thread Contributor

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    @Brew12 it could be something different, that would just be my first step since it’s a known matter, and once eliminated you can then check with our awesome GHL reps as to next steps to solving it. Not sure how many people know about the doser cap issue, either.
     
    Brew12 likes this.
  9. coweyes298

    coweyes298 Active Member

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    Should be something else. They claimed that it was a tolerance issue from an earlier batch 2 years ago or so. I got some bad head for my doser 2.1 which was built at end of 2016. But once I got the replacement head cover and roller unit from GHL, they still stucked several months later...I found out if the head was set to run at lowest speed at the beginning it will last forever. But if you set it to run at fastest setting or 2nd from fastest it will grind the blue cover no matter what...
     
  10. Brew12

    Brew12 Electrical Gru R2R Supporter R2R Excellence Award Reef Squad Leader Article Contributor Build Thread Contributor Partner Member 2018

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    Yup, that is what I am thinking. Probably just not the right doser for my application. I likely should be using the Maxi for 1L per day dosing and the regular one for my much smaller dosing amounts.
     
  11. HolisticBear

    HolisticBear Valuable Member R2R Supporter Reef Tank 365 Build Thread Contributor Partner Member 2018

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    My doser from last November does the same thing, it was a new stock after the Florida Hurricane, so about the same time period as the OP. I never did fix it, thou GHL did reach out to me. I didn't feel like mailing it in for repairs and having no doser on hand. In my case, it doesn't stick when running at higher speeds and always sticks at the lower speeds, the opposite of what @coweyes298 described. This happened immediately after opening during calibration, not after some time.

    There are a decent number of posts on similar issue at FB. Users offer various tips as re-seating it and ensuring the blue cover isn't too tight. If you want to browse the GHL Group.
     
  12. Marco@GHLUSA

    Marco@GHLUSA GHL Team R2R Supporter Platinum Sponsor

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    If you’re still having trouble; please send us an email to troubleshoot.
    Info@ghlusa.com - please include your username so we can keep track of the issue.
     
  13. Brew12

    Brew12 Electrical Gru R2R Supporter R2R Excellence Award Reef Squad Leader Article Contributor Build Thread Contributor Partner Member 2018

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    @Marco@GHLUSA Thank you for the amazing customer service! You guys have been busy but I wanted you to know that I appreciate your help with this issue. Top notch!
     
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