Had my second bk pump die,only 2 years old.First one lasted 3 months.Pump starts runs fine but stops after a couple minutes.In about 30 minutes goes throu the same routine.Pumps been regualy clean and no friction.Bearing especialy.Im soaking it in vinegar.Is the block completely dead or is there something im missing.All parts look clean but maybe theres build up.Any help appreciatted.