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Old 12-03-2017, 09:52 AM   #1
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Eheim Jager 250 calibrating the heater

I just purchased your Eheim Jager 250 heater for my new 60 gal freshwater aquarium ( I also bought your Professional 4+ 600 canister filter).

My problem I am having is with calibrating the heater.

I set the thermostat to 78 degrees (I have an external digital temperature gauge I am comparing to. The tank got to 82 degrees. I tried to move the red ring to 82 degrees but there is a small blue nub with white on top that prevents turning the red ring past it.
I need to turn the red ring past it to set it to 82 degrees. What am I doing wrong?
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Old 12-03-2017, 04:28 PM   #2
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Mine has that little nub, but I was able to calibrate it. You can't turn the ring the other direction?
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Old 12-03-2017, 06:07 PM   #3
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Please explain as my little brain doesn't understand.
A=as far as the red ring can be moved downward.
B=what the temperature should be 71 degrees before calibration. Actual temp in 78 degrees.
C=as far as the red ring can be moved in the other direction before B hits C.
I need to move B to 78 degrees which is already as far up (or high) as I can move it. Moving it in the other direction will lower the temp, not raise it.

What am I missing? Thanks in advance.
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Old 12-10-2017, 09:06 PM   #4
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Sorry for the late reply. Since you're at 78, you can't just push the red arrow counterclockwise until it points to 78?
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Old 12-10-2017, 10:58 PM   #5
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I have 2 of these filters that can not be calibrated properly also..
Never again for me..I am aqueon pro all the way.
One should question a company that unlike all others leaves it to the customer to calibrate the setting....
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Old 12-11-2017, 08:35 AM   #6
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I have finally got the heater to a stable temp but there is no way to move the red ring far enough to match the real temp. I contacted Eheim with a complete description and photo's and all they did was send me a generic video of how to adjust it which I have seen before. I know how to adjust it. It doesn't work.
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Old 12-11-2017, 08:58 AM   #7
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If I remember correctly you don't move the red ring, you turn the blue part.....

EDIT: I misread your first post ignore this
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Old 12-11-2017, 08:59 AM   #8
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I think mine were assembled backwards as I could have easily set it for whatever and used my thermometer but the actual task of setting the pointer to the temp was /is { I still have them in drawer] was impossible.
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Old 12-11-2017, 09:23 AM   #9
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Quote:
Originally Posted by ZxC View Post
If I remember correctly you don't move the red ring, you turn the blue part.....

EDIT: I misread your first post ignore this
The blue ring changes the temp and the red ring is just a marker.
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Old 12-11-2017, 09:26 AM   #10
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Quote:
Originally Posted by MasterBlaster73 View Post
The blue ring changes the temp and the red ring is just a marker.
Yes I know, I read the first post wrong.
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