I noticed in the middle of a shower that the pilot had gone out, I relit and thought it was good but out it went again, finally I watched it and when the burner goes out it poofs and the pilot goes with it, I changed the thermal couple, took apart the pilot and cleaned it, still no change, when I push the button down to lite, the pilot with light with a blue flame little yellow on very top, but thermal couple is in nice blue flame, but won't stay lit, and then sometimes it will stay lit no problem until the first cycle. Its almost like it won't lite because the thermostate senses the water is at temp but... I have been takeing luke warm showers for a week.