Depending if this is a new issue or old, It could be a couple of issues. Check the belts for slipping. Proper tension on walking belt (check your manual) or drive belt -remove the cover and you might be able to see if the belt is slipping or it could be a load issue (electronics not sensing added load fast enough). My bet is belt tension. Also Lubricate,lubricate,lubricate www.twincityrepair.com
Answers & Comments
Depending if this is a new issue or old, It could be a couple of issues. Check the belts for slipping. Proper tension on walking belt (check your manual) or drive belt -remove the cover and you might be able to see if the belt is slipping or it could be a load issue (electronics not sensing added load fast enough). My bet is belt tension. Also Lubricate,lubricate,lubricate
www.twincityrepair.com