[Newell Attack]

I agree check the thermocoupler first, If that does not fix your problem then you might need a new control board since this sounds like the problem I had with my Dometic fridge when we first purchased our Newell. First I cleaned everything...burner, flue, etc. The problem persisted but since it would light and stay lit for a few minutes it didn't seem to me to be a thermocouple. I purchased a new control board ($104 - Dinosaur board) which was very easy to install....less than 10 minutes. All problems were solved & it started working like new again.