I am hoping they will let me send the SL1 back in and hopefully replace it. The question is when they will respond. It's so aggravating to wait for a response...

On the plus site: I got the head unit and the two PC4s back on track!

My temp probe seems shot and I'll jut buy a new one. But I only bought the SL1 in February and am hoping they will replace it on warranty.

Lesson learned: if it works don't try and fix it.

I have and older RKL system on the Reef tank (had it from the tank I had before) and I just don't update or mess with it and it's never given me the slightest problem.