Polaris 380 stand on nose while on will not move to wheels on ground what could be the problem

First, check to confirm that the blue restrictor disk is installed in the UWF to decrease water flow. It sounds like you are getting too much water pressure. You could also install the red restrictor disk to decrease water flow even more. If this does not work, verify the back-up valve is cycling. Hold the valve out of the water and watch the jet. It should come on and go off. Make sure that your thrust jets are working properly and are positioned correctly. Also, try removing the head float and shaking it. If there is water in the float, you will want to get a new one. Finally, check the hose floats to make sure they are
spaced evenly. One of these soultions should make your pool cleaner function properly. If you need additional help, please let me know.