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Eheim Jager heater issues?
Posted: Thu May 15, 2025 8:31 am
by duskfox
Anyone else having problems with their Eheim Jager heater? Mine keeps turning off randomly, even though the temp is set right. Tank's at 78F, but it'll just cut out for no reason. Using it in a 40-gallon with sand substrate and a Fluval 307.
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 8:49 am
by guppyzone
Mine's been sketchy too. Sometimes it works fine, other times it's like nah, not today. Got it in a 20-gallon with some Guppies and a sponge filter. Dunno if it's the heater or my power strip acting up.
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 8:58 am
by Shadowg
Had a similar vibe with mine last winter. Turned out the thermostat was wonky. Eheim replaced it under warranty, no hassle. You guys check if yours are still covered?
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 9:46 am
by tortuga
Eheim Jagers are generally reliable, but thermostat failures aren't unheard of. First, verify the heater's fully submerged and the dial isn't obstructed. Second, test it in a bucket with a separate thermometer to confirm inconsistency. If it's faulty, contact Eheim—their customer service is decent.
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 10:35 am
by duskfox
tortuga wrote: ↑Thu May 15, 2025 9:46 am
Eheim Jagers are generally reliable, but thermostat failures aren't unheard of. First, verify the heater's fully submerged and the dial isn't obstructed. Second, test it in a bucket with a separate thermometer to confirm inconsistency. If it's faulty, contact Eheim—their customer service is decent.
Thanks, gonna try the bucket test tonight. It's definitely submerged, but the dial might be gunked up. Appreciate the tip.
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 11:35 am
by guppyzone
Mine's only a few months old, so warranty should cover it. Gonna dig up the receipt. Shadowg, how long did the replacement take?
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 12:28 pm
by Shadowg
guppyzone wrote: ↑Thu May 15, 2025 11:35 am
Mine's only a few months old, so warranty should cover it. Gonna dig up the receipt. Shadowg, how long did the replacement take?
Took about two weeks total. They sent a new one after I mailed the old one back. Pack it well, their return instructions are picky.
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 12:50 pm
by tortuga
If the bucket test shows fluctuations, note the exact behavior—Eheim might ask for details. Also, ensure your tank's flow isn't creating cold spots near the heater. A powerhead can help distribute heat evenly.
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 1:42 pm
by guppyzone
Good call on the flow. My sponge filter's output might be too weak. Gonna toss in a small wave maker and see if that stabilizes things.
Re: Eheim Jager heater issues?
Posted: Thu May 15, 2025 2:07 pm
by Shadowg
Let us know if the wave maker helps. Might steal that idea if my new heater acts up again.