Hi all. I have a Tunze 3152 on my tank, and it's been doing it's "job" for almost a year now. However, the last two weeks, for some reason when my ATO reservoir in my sump gets low it won't kick on and refill. I clean all the parts religiously. I'll manually push the float switch up and down and nothing happens...I unplug the ATO power wait for maybe 15-20 seconds and plug it back in and it'll kick in and work just fine again. Any Ideas?? I am stumped and ready to yank this ATO out and get something different.
