Buttons or dial feel very stiff or jammed, making it hard to change settings.

Safety first: Unplug the unit before working on controls.

• Surface cleaning: Clean around buttons and dials with a slightly damp cloth. Avoid letting liquid run into the panel.
• Inspect dial mechanism: Remove the knob or dial (if removable) and check for debris or damage to the encoder shaft.
• Clean debris: Use compressed air or a soft brush to remove crumbs or grease from around the controls.
• Replace control panel: If the dial shaft is cracked or buttons are physically damaged, replace the control panel assembly.