I have owned my Apex for one year now and never had this problem. Yesterday, while performing maintenance on my aquarium, I had the Apex prolonged feeding mode (1 hour for maintenance) since it was one of my bigger maintenance days. I have done this plenty of times in the past with no issues but yesterday, while performing maintenance to the sump, I noticed that the water in the last compartment of my sump, the section that houses the return pump and my titanium heater, had steam rising from it. I checked the temperature in that section and it was a whopping 113 degrees. I confirmed the temp with another thermometer. I chalked it up to the water being stagnant in that section too long without me turning off the heater although I was not completely satisfied with that answer since, again, I have performed hour long maintenance sessions in the past without any issues. The water in the main tank area stayed within my desired parameters. Once I turned off the heater and back on the return pump intermittently, the problem seem tom have been solved.
Just a few moments ago, I decided to just check up on my system before bedtime as I always do and found my apex temperature probe reading 83.4. I was very surprised since my apex is programmed to turn off the heater when the temperature is >78 and to turn on when it is <77. The Fallback is programmed for Off. Despite this programming, the heater outlet was on. My heater is plugged into the 4th outlet on my E8 energy bar.
Again, I have never had this problem before. I am not sure what to do now besides unplug the heater...
After more consideration of the issue, I just recalled something. About 2 months ago, I recall making some adjustments to my apex programming and noticed an issue at that time. I was trying to adjust parameters for my temperature program when I noticed that although my temperature probe is plugged into the PM2 module (Tmpx4), every time I tried entering Tmpx4 during my programming, for some reason, Apex fusion and my Apex iphone app would automatically switch it to tmp as if I had the probe plugged into the main module. It was repeatedly doing that and I thought I had fixed it and was not thinking about it whenever I would work in Fusion but after trying to get to the bottom of this fiasco just now, I recalled that it was doing that and sure enough, the programming language was automatically switched back to tmp in Fusion. Also, last night when I discovered my water in the sump was boiling, every time I was trying to switch the heater outlet to "off" in Fusion, Apex was automatically turn the heater back into the "on" position.
I have no idea what is going on. I think the last time I updated the main module was about 3 months ago maybe. Does anyone have any suggestions or insight into this problem. This really concerns me especially since I just added new coral into my aquarium today. I am sure they are not pleased with the 7 degree temperature swing within the past 5 hours.
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