Flashing lights

Check your exit hose spigot, it may be clogged. This is if your filter is all clean (ref manual) There should be air for passage in the standpipe behind. Your hose should not fit airtight into the standpipe and neither too deep into it (maximum 7 inches). Snaking out your standpipe & drain would be good. All lights flashing indicates you have a block somewhere.

Pl. rate me if helped............