I just aquired a 1995 Jacuzzi Lexus LC hot tub and the filter cycle is supposed to be preset for 2 hours twice a day, but it runs for over 4 hours twice a day. There is no info in any of the manuals about how to reset this . There are digital topside controls including temp arrows up and down, jets, light and mode selection (econ or standard). I understand that there is some combination of these buttons to push to change the programming - any ideas?

i may be wrong, but I don't think you can change the filter cycle duration on that model.