Have read thru many posts and am still stumped as to why gas control valve wont open main burner. First some background - the previous stoves owner had somehow discovered that if he slightly loosened the 4 front screws on the gas control valve that the flame would come up -scary as you could clearly smell propane gas when you got down near it. So I tested mv on the thermopile after pilot ran for 5 mins and tested as bad ( 0 mv). I replaced the gas control valve (as it had been opened and is not field sevicable)and the thermopile. Cleaned both pilot and main burner orifice and main baffles. Second stage regulator at house was recently replaced. Gas pressure coming in tests good. pilot light is strong but mv on new t.p. only comes up to 195 m.v. at peak. I was told by another tech that the min. required is only 135 m.v. (I would have thought that it would be more like 200-300 m.v.) I am stumped and would appreciate any suggestions on where to look next?