The igniter has gone out on my heater, but I don't know where it is located to replace it. I don't know wher the color code diagnostic blinking system is either. Can you help? I have gone two winters with no heat because I cannot afford to get it fixed. Hopefully it is an easy replacement so I can do it myself.

There should be some kind of access door on the front. If you can't get it open you shouldn't be servicing it.