I certainly don't see why not. I'd email them or call and tell them just what you told here. See what they have to say about self diagnosis, perhaps things to check etc.
It might be something a new part might cure to save on the time away and shipping etc.
The receipt isn't important really.
Keep us posted on what you find out and the results, I think they'll fix you up proper.
In Memory of Paul "Dietrich" Stines.
Dad: Say something nice to your cousin Shirley
Dietrich: For a fat girl you sure don't sweat much.
Cue sound of Head slap.
RIP Muggsy & TMan
"If you are a warrior legally authorized to carry a weapon and you step outside without that weapon, then you become a sheep, pretending that JOCKO will not come today."