Customer calls and says the water heater will heat a tank of water and shut itself down. He also says he had a hard time getting the pilot to stay lit. He would light the pilot and the burner would come on for 5 or 6 minutes and then it would shut down. Other times he said it would run for about 45 min to an hour.
I've been to the home and corrected the issue. The above is verbatim from my notes when the customer placed the service call. Anyone care to guess what the trouble was?