Colman evcon mod.#7121-5906. My pilot light wont turn on, its self igniting and I have tryed sevrel times with no luck. The blower still works, we have gas, its still getting power. Iv also noticed that a yellow light turns on just under the green one. Any Idea what that means? Please help its cold!...

I have a colman evcon furnace and the pilot light wont go on, its self igniting and have tryed sevral times to relight with no luck. Iv noticed that a yellow light now turns on right below the green light. MOdle # 7121-5906 Please help its cold in here!!!!!!!!!!!