Hello - newbie to the forum but looking for an answer. I have a Desa VC36N Series direct vent fireplace. The pilot will light and the burner will turn on but then after about 5 minutes I hear a click which is the valve shutting off. I can relight the pilot in a matter of minutes and light the burner and it shuts off again in 5 minutes. I have already replaced the entire pilot assembly which did not solve the problem. The vent is clear. Is my next step to replace the valve? It is part # 14389 which comes up in a search as VALVE KIT 820 NOVA MILLIVOLT GAS VALVE. This fireplace is about 12 years old and always worked fine until about a year ago when it started doing this. Thank you for any help!