I cannot adjust the height of the chair.

• Check if you have fully pulled up the height control lever on the bottom left of the seat.
 
• You should pull up the lever when you raise or lower the height of the chair. To lower the seat, pull up the lever while sitting on the seat to apply weight to it. To raise the seat, pull up the lever while the seat is vacant.
 
• If you cannot adjust the height of the chair by using the above steps, there may be a failure on the lever or the gas cylinder. In such a case, leave a post specifying your symptoms on the customer bulletin board on our website to contact us.