I have searched the threads and haven't found an answer to my question, so here goes...
We have a polaris 280 that barely moves around the pool. I have been checking filters for debris and leaks in hoses as wheels do not turn much when in use. Jet on back sprays magnificently and tail whips like nobody's business, but wheels not so much.
Back up valve works great but I have noticed there is some water coming out during normal operation. Is that common or could it be stealing needed pressure? What else should I check or replace?