As the topic states my 1.5hp dynamo pump motor has started to turn itself on and off throughout the day. It is only about 13 months old(go figure a month out of warranty). My pool is 13,500 gallons and I was wondering if this pump is too large? I like having the larger pump for my aqua critter vac, it works really well but would a 1hp do about the same? I am going to go ahead and get a 2 speed pump no matter what I do so what size do yall recommend? Also what would make my pump start overheating? There are no restrictions or anything, nothing has changed. Thanks in advance for your inputs.