Swimming pools blog

Just got a new liner installed. After the installation, the polaris
will not go (the wheels will not turn by themselves). If you turn 1 by
hand, all the others roll easily. I opened it up, & there’s nothing
wrong w/ the belts. Screen is clean.
It seems I read it’s sensitive to water pressure, & I think that’s the
problem. Somehow the pool is not set how it was previous to the liner
installation, but I don’t know what they did.
What makes the wheels turn? Do I need to get more or less water
pressure to the polaris?
TIA,
Susan