Glad you come to the right place. Welcome.
Think skippy's thoughts might be it, might be nothing to do with the water at all. Just call Tony at CS today for direct help. He's great with this stuff.
I certainly wouldn't post the question there, you'll get some help, but more grief. I saw a post this morning..."see another reason to own a stick burner". I wanted to reply about the contest where all the stick burners got soaked and they all had wet wood, but didn't.
The main issues with water are one, not getting it in the circuitry. Check for the fuse. 2nd is the pellets and pelletcrete. If they get wet and swell it's a big mess.
Think you said the cover was on back order. Next time, just put a big plastic bag over the hopper if it's raining.
Good luck, let us know how it comes out.
Smokin'