I washed our 337 today. While extending the slide awning I stopped it about half way. When I hit the switch to extend it all the way out it wouldn't extend for about 15 seconds. Extended it all the way out and then retracted it about half way. Again when I hit the retract switch it sat for about 15 seconds and then retracted. Is this normal or is something going on? I can fully retract and extend the awning with no hesitation. Maybe its always been this way and I never noticed it before .Any ideas?