British Columbia Aquarium Forums banner

Eheim Jager heater -- how to adjust the temp?

23K views 17 replies 11 participants last post by  enzotesta  
#1 ·
Does anyone know how to change the temp on the Eheim Jager heater?

I've got a 100 watt Eheim Jager heater in a 22 gallon tank. The red light is on all the time. The water is always at 80 degrees but I want it to be at 76. The heater has a dial on the top and whether I move the dial far to the left or far to the right, it doesn't matter -- the water remains at 80.

There must be something special to do but I've lost the paper instructions and I can't find them online. Any suggestions? Thanks!
 
#2 ·
If it is the style I have with a red dial that moves around the outside of the heater, there should be a pointer showing what temp it is set at. If the heater is always on though when you change the temp just try unplugging it. If your wanting 76 degrees, then that is about room temp & you won't need the heater.
 
#3 ·
#4 ·
Dang, I was moving the red ring!!! Thanks, 2wheelsx2!
Vicz24, the room temp at our house is usually a lot lower than 74, typically around 65. So, for these fish I should have a heater. However, 2 of my cherry shrimp tanks are not heated.
 
#7 ·
Thank you, Gary. I was able to follow your instructions much better than the ones written by Eheim, actually, but it was very reassuring to read Eheim's instructions online. For some reason, I just hadn't been able to find them.

I will watch the temp for a few days to make sure that I haven't messed up.

Sometimes, equipment is so well designed that I just cannot figure it out with my analogue pea brain.
 
#8 ·
I followed the directions (I'm pretty sure, anyway!) but the tank is still at 80 after an overnight wait. This is not an old heater, probably about 4 or 5 months, and it has kept the tank at 80 all that time.

Do you think it's time to get another heater? Is there something else I should try? (Spin counterclockwise 3 times, perform an incantation under the full moon?)
 
#9 ·
Where did you get the heater? I would bring it back. If you got it at J&L there should be no problem in exchanging it. Sounds like the controller in it is fried. So the indicator light stays on the whole time? Are you able to spin the dial until the light goes off?