I had the same problem it keep triping I now have removed the little magnet on the houseing the pump works with it hope it can solve the problemNow I have the same issue! It is very annoying and follows the exact same pattern of tripping! I have been trying to get it to work since Thursday evening. I'm pleased it is not the house electrics yet annoying to now have to buy a new pump when only 15 months old (sigh). Mine is a Easyclear 4500 so maybe a fault on them all.