Ok, make sure the selector is placed in CARPET position (not in Bare Floor position).
To see where is this selector located please check page 24 of your manual. If you don't have the manual you can download it from here ===> ftp://ftp.panasonic.com/vacuum/mcul429/mc-ul429_mul_om.pdf
If the selector is already in CARPET position and you still get the issue, then the vacuum is defective, unfortunately, and will need to be repaired or replaced. You can contact Customer Service at 1-***-***-**** for scheduling a repair.
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