Model Select State Series 200/201 High Efficiency GS6 50 YOCT 2007 (This was in the house when we bought it 4 years ago, so I have no documentation) Been having an issue where the pilot would go out after heating the tank, pretty much just like this guy. http://www.plumbingforums.com/forum/f12/pilot-light-will-not-stay-lit-2883/ I have not opened the unit, but I did get in under the thing with compressed air and a feather duster and cleaned that filter. It worked for a day after that. This morning it was out again, so I built a vacuum attachment consisting of a small piece of copper tubing and a shortened 90 so I could really get in there and vacuum the filter. Problem now is the pilot wont stay lit. Tested the thermocouple and I am getting 25mw, so that should be fine. Suggestions? Should I take it apart and clean out the burn chamber or is it possibly the valve?