Polaris says that the average cleaner like yours (any of the x80 series), running 3 hours a day, travels about 2500 miles a year in the pool. So, yours has gone about 12,500 miles in its life so far. It may be time for a little service. However, a Polaris that is not moving like it used to could be as simple as having a blocked screen in the wall fitting or a filter that is dirty and the booster pump is not receiving enough water or the booster pump itself is damaged or clogged. It needs to be checked by a service person familiar with them who has kept up with Polaris' service procedures.

My last Polaris, a 180, lasted over 16 years in my pool with very minimal service. It finally completely broke, the frame actually broke, and I put in a 280 just 3 days ago. I expect similar service from it. It is the only pressure-side booster-pump operated cleaner I recommend or sell even though some will say that that is a narrow view. I like to sell and install what I know I won't have to come back on for a very long time.