I have a Pentair Minimax heater...

This summer my heater wasn't firing up at all. After having the electrician and gas company look at it, I finally called the pool company who sold it to me. It turned out to be a faulty ignitor. They said they have been replacing alot of them this summer in the Minimax heater. It's a cheap part...although they replaced it free of charge...

Hope that helps...