Ace Pelizon Plumbing was called out on a Water heater not lit. Ace Pelizon Plumbing found existing Bradford white water heater not lighting. Existing water heater installed to code. Not lit upon arrival. On site contact stated that other work is being done inside home. Water heater was not lit when he returned from vacation. Tech lit water heater and verified function of heater while on site. Heater is registering temp and shutting off/turning back on. Pilot staying lit. Unknown cause of heater being off at this time. Informed on site contact that if water heater goes out again replacement is recommended.