Larson Air came and had to fix my heater, and he put in a new ignitor that worked all day and stopped that night. I called them the next morning and he went and put in a new ignitor--then determined the control board was bad. They credited work on the ignitor, but I had to shell out another $600 for the control board. It was fixed, it just wasn't fixed immediately. But, I was happy with their service because they were good.