HGV Seat Settings Won’t Stay Put? Describe the Fault Clearly

There is a difference between resetting a shared truck seat and repeatedly correcting a setting that will not hold. If the height, backrest or suspension position changes unexpectedly, extra padding is not the first answer.

Identify the setting

With the vehicle safely parked, use the seat instructions to name the adjustment involved. Is the seat losing height, is the backrest moving, or is a control failing to respond? A clear description helps the operator distinguish familiarisation from a possible fault.

Do not investigate beneath a moving suspension seat or attempt an air-system repair yourself. Follow the operator’s defect-reporting and maintenance procedures.

Make the report useful

• Record the vehicle or fleet identifier.
• Describe the setting and the unexpected change.
• Note when you first noticed it and whether it repeats.
• Explain any effect on reaching controls or maintaining a safe position.
• Ask for the next action and confirmation of who is handling it.

Make notes when safely stopped, never while driving. You do not need to diagnose the mechanism or estimate technical vibration exposure to explain what happened.

Do not compensate for a fault

A cushion may change how the seat feels without fixing why the setting moves. It can also obscure a useful clue or alter your relationship with the controls. Report the issue as a seat concern rather than treating repeated adjustment as something you simply have to tolerate.

HSE’s vibration-control guidance includes vehicle and seat maintenance.

Follow the operator’s safety decision

If the position affects safe vehicle control, stop safely and notify the operator rather than continuing to experiment. Seek appropriate occupational-health or clinical advice for persistent symptoms.

Before fitting a seating accessory in a vehicle, confirm that the exact item is permitted for your seat by the vehicle maker. Keep restraints, airbags, head restraints and control access clear, and follow any operator requirements for work vehicles.