You may want to check the sensors in case they have buildup of scale or such. If so you will have to clean them with a 1 in 4 solution of muriatic acid. Make sure you add the acid to the water, and use chemical gloves and goggles for this.

Check for any loose electrical connections as well and report back.

Pat


(Supermods: This thread needs to be moved to the SWCG and Chlorinators forum)