Not sure what has happened but we had a freeze up during winter so we shut down tub until spring. Everything thawed out and seemed OK. Put new filter in as well as new o ring by cartridge (leaked all last year), when we started it up I was getting low pressure issues and filter being displayed. I redid the whole PVC plumbing down by control box and the filter issue went away and worked pretty good. We have 2 pumps (1 hi/lo, 1 hi), I've replaced the 2 speed a couple times now (2 years ago was last time), but again all works good. Then exactly 12 hours after turning on it will blow the GFI by the house (alarm goes off). I reset it and all is fine until next 12 hours. I set it to see what is happening and it seems like when it calls for the 2 speed pump to kick in is when it blows the GFI. However I can run it manually just fine. We put a new control board in 2 years ago and has worked great. Blower kept blowing fuse as well so just disconnected it.
Any ideas ????