I recently purchased a used Frigidaire electric stackable washer & dryer. The dryer gets warm but it does not get hot. I have cleaned out the lint and the vents in the back. Last night I washed 1 set of queen sheets (not flannel or anything heavy) and it took over 2.5 hrs for the sheets to dry and they were somewhat warm but not hot - usually it takes 2 - 3 times to dry one load of laundery. Any suggestions?