thanks for your input,i have had this suggested to me by another pool/spa dealer,that i have the limit switch tested,and to check/replace filter cartridge,how often do the cartridge need to be cleaned/replaced in this unit,in the manual it says periodicaly,whatever that means,i really am a newbie at this,and getting very discouridged,i will have the spa shut down and winterized,and test the limit sw
thank you