Aqua Hot issue
After much help from Rudy it seems my AH was not getting enough fresh air. It always smoked at 8,000 ft. when starting up. Just finished doing a service on it after about 45 days of use half in summer and half in winter. Found the same gunk in the combustion chamber that was in the last service I did after purchasing it. If you do your own servicing be sure to pull out the combustion chamber and clean the inside of it. This is what was in mine.
Topic: Aqua Hot issue