Duet washer and Dryer 4 years old

I have a duet washer, it does not seem to be spinning like it should.  I have not had it serviced since I got it four years ago.  The dryer was just moved from its original spot in the laundry room, has flex duct that goes about 30 feet under the house, not the best way, but the only way I could see to vent it.  The dryer is now taking a long time to dry and does not seem to be getting very hot.  Should I call in the service person to look at both of them or what? Thanks, devkirn