Hey sorry for late reply fellas, the propane tanks are both brand new and full, valves wide open and selector is pointed toward one tank. I will try one tank separate and the other things you recommended. I tested the thermistor like I read on a forum and guys say it should read between 7000-10000 ohms while in a glass of ice water. Mine read 8000ish. Which would normally mean the thermistor is ok? Any other ideas before I make a service call and get bent over. Also I took apart the stove and was surprised to see that previous owner may of replaced that high speed burned as it looks brand new. Maybe they replaced it with the smaller BTU rear type burner