Make sure that your automatic pool cleaner doesn't have an obstruction in the hose that might not immediately be visible. This could cause it to circulate in one end of the pool. Also, check the water pressure to ensure that it has enough force to travel the entire pool.
SOURCE: Ray Vac moving slow, circles deep end, sticks on side of pool
I have the same problem and the best solution is to repair/replace the hydro timer kit. It has inner gears that are plastic and wear down and doesn't rotate through the cycle of water flo that changes it's direction. I'm in the process of exhaustive repair and I'm going to replace the hydro timer - (inside part only) and then see what happens. Moving the gears did change it's moving patterns tho.
SOURCE: same prob. ray vac circles bottom of deep end.
Mabey the gears in the backup valve a small football in line about 18" from wall. Just pull it from the water if you have one that is about every one to two munites it should send a jet of water out the side of the backup valve for about ten or fifteen seconds. If it dosen't you need a new one . Quite often a more likliy problem is tight swivels your local pool store can ck these for you and the leingth of your hose should just make the far point of the pool so it streches the hose and pulls all the kinks and loops out. Your pool store can help you with much of this and they will check the whole unit if you bring it in to the store and will usually just charge for parts.
SOURCE: Ray Vac Pool Cleaner for Inground Concrete: after cleaning out debris from my ray vac my jandy...
What model is it? Is it robotic (indepentdent of your pump and filter)? If it is attached to your pump system, it could be the cord getting tangled and causing the pool cleaner to move in circles. You might want to consider running it when you are available to watch it or getting a robotic cleaner that you can set to operate at certain times. You might just need to check the hose for defects that would cause it tangle.
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