First, unhook the hose connector from the fitting where the Polaris connects to the wall of the pool. Probably will take a 1/4 turn to the left and then slide out. Inside the end of the hose connector is a metal screen. Look to see if it is clogged. If it is, remove the screen and clean it. The screen can be a little difficult to get out sometimes. Take your time and try not to bend it. Post again to let us know if that fixes it.