I have a Haywood natural gas pool heater, H250FDN. Recently it's been acting up. When I opened my pool this spring the heater wouldn't start. There was all sorts of clicks and but it didn't ignite. The temperature display started flashing and the amber service light was lit. usually I hear the clicks, some fan start and then the ignition. It eventually cured itself though the next day and all was fine through out the summer.
Well, I'm back to the same problem now except the problem won't go away. I pulled the cover off the front and did a quick inspection and didn't see anything obviously wrong. It's not a big deal because I was going to close the pool in a couple of weeks but I would like to get some advice anyway in case I'm in for a major repair/expense.