I have a Compool Lx220 solar control system and it has been acting funny by having a relay make a clicking noise and turning on and off the control valve in the middle of the night. It has been doing it for a couple of years and someone suggested the micro switches in the control valve might be going bad so I changed them and it seemed to help for a while then it would do it sporadically until last week and it did it for over a half hour and I got tired of watching it. The next night it was not doing it but the Pool Cleaner Delay Expired light was on. So I tried to call Pentair to see if a Pentair Solar Touch controller is a replacement for Lx220 then after waiting on hold for 1 hour 10min I found out they could not tell me anything so I decide to ask the people here that have helped me out so much in the past. Is the Pentair Solar Touch controller 521590 a replacement for the Compool Lx220 solar control? Thank you for all your great advice.