Ok here goes. Last winter I was in Yuma Az. and filled up my propane. Had not used it until this past week. When using it in the day time, no problem. After sun goes down and temps drop, propane does not flow. Next day during 65 plus degrees = no problem. Could I have been given Butane by a bad guy dealer? Valve and regulator are new.
Butane is a gas till 31 degrees so i doubt that is the problem. But it certainly is a puzzler.