Currently my pool has an intermatic timer. The gears are working as I checked that they are moving as well as the timer clock moves at the appropriate speed and is lined up with the current time. I thought it could have been the trippers, so I replaced them yesterday. They are appropriately placed and well fixed. However, I woke this AM to notice the pool was on and never turned off. The tripper is firm against the shut off switch and there is an audible clicking noise as if the tripper is trying to turn off the switch, but does not have enough force to do so? Does anyone have any suggestions?