Hank, I've had the same problem with the HWH in my Casita trailer for quite a while and decided it was time to try to fix it. I did lots of searching and found this thread. Then I went to your Facebook page with the step by step photos and info. I studied it and ordered the pilot burner igniter and then studied the photos some more. I had a lot of trouble removing one of the large bolts, finally had to cut it off, but once that was done the rest was easy. Now when I light the HWH it fired up immediately with no flashback/explosion. What a relief! Thanks so much for taking the time to take & post the photos along with all the step by step info.
