Heat has been fading and unpredictable for some time. The flame ignites but goes out. I have replaced the thermal fuse and gas coils but the problem persists. I have noticed that the dryer is not sensing wetness level of the clothes. At the beginning of a cycle the "sensing" light stays on for a period of time then stays on"wet" for the rest of the cycle. Is the problem the moisture sensing bar or something else? Thanks for your help.