Sorry for my delay in responding and thank you for your help. When you say the "cleaner" do you mean the polaris that cleans the pool? I did clean the filter between the pump and the hose to the polaris, but the pump still clicked off. I did not notice it straining when it clicked off. It was really hot outside and I suspect that may have something to do with it. I ran it all night last night, and it didn't click off. Will excessive heat cause it to shut off?