No Hi low function

Hey! check the connected drives or the condition of the fuses (the control box is under the couch). If it is old, then check the relay or the limit switch for the state of the rise or bottom is faulty. (witemonah@mail.ru)

If one column fails, neither will work to raise or lower the bed.  Try the trendelenburg/reverse trendelenburg function.  If one works but not the other, that will tell you which column is bad