Lint buildup in the condensing tube can be a problem but to resolve this issue, open the top panel and remove the fan motor assembly (M110).
Using a pitcher of hot water, pour it down the condensing tube (M120). You may have to do this several times.
Turn on the washer and set to spin to remove the water in the tub.
Check to make sure the thermistors (M235) and (M230) are cleared of any lint debris around it. This will require you to remove the duct outlet cover (M100).
Once you've cleaned out the condensing tube, remove the back panel to access the bellows (M310). Loosen the hose clamp on the tube side and pull out the bellows. Clean out any remaining lint debris in this area and reassemble the unit.
Hope this helps.