Pool and spa cycling on and off unexpectedly

johig

Gold Supporter
May 23, 2019
67
Mission Viejo, Orange County, CA
Pool Size
17000
Surface
Plaster
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
Good morning! None of my pool equipment is set to run between 10 PM and 9 AM. The last two nights, the pool and spa have been cycling on and off between midnight and 7 AM. Here are screenshots of the history on my Pentair app from yesterday morning and this morning:
Screenshot 2024-11-08 at 7.09.47 AM.png Screenshot 2024-11-08 at 7.13.39 AM.png
I realized yesterday that my Easytouch/Screenlogic system was not password protected, so I fixed that to make sure this was not someone accessing the system remotely. However, the problem reoccurred last night. I checked the programmed schedules and there is nothing that would explain this. I am in Southern California and the pool got covered in ash this week. I read online that clogs in the system/filter could lead to pump cycling, but nothing about the system cycling itself while it is set to be off. Does anyone know if that is something that could happen - the system turning itself on in response to filter clogs? For now, I've turned everything off at the breaker, and I'm going to open up the filter. Assuming it is going to be very dirty, I'll clean the cartridges and see if that fixes the issue. If anyone else has any ideas in the meantime about what is causing this, I would love to hear them, especially if this is a known issue or something more serious that I might need to get professional help with. Thanks!
 
Check your freeze protection settings. It looks like freeze protection cycling between pool and spa.
 
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Check your freeze protection settings. It looks like freeze protection cycling between pool and spa.
Thanks. That makes a lot of sense. I was having trouble with my temperature sensor over the summer so maybe it thinks it is freezing (it's definitely not). I'll see if I can get the air and water tmp sensors to calibrate, otherwise it might be time to call in a professional. I really appreciate your quick response!
 
I'm coming back here to say thank you, ajw22, this was the correct answer and fixed my problem! For anyone else who has a similar issue, this is what the setting looks like in the Screenlogic app:
Screenshot 2024-11-22 at 5.50.37 PM.png
Thanks again.