Thanks everybody. I am going to try their customer support today and will let you know what they say. If they can not trouble shoot it, I will return it to COSTCO, but I would like to buy a replacement from COSTCO due to their generous return policy. They are currently selling the Dolphin Dynamic and the Aquabot C and the Aquabot Turbo C. Its been some time since I scoured these forums for reviews of the Aquabot products. SO I ask - what is everyones opinion of these Aquabots ? Neither seem to be remote controlled. So bottom line-- if I want to stick with COSTCO, I either give a replacement Dolphin a try or switch to the Aquabot. Thanks.