will not dry, no heat?

I have a propane dryer, the propane ran out early due to the extreme winter we are having, we tried to relight it but it won't do it. How can we fix it. I had an extended warrenty but can't find the paper work, and the girl who called me about getting an extended warrrenty on my frig can't tell me how to find out if the dryer is still under warrenty