Amana 80 furnace has code 1, lockout, the unit lites off rns for few secondsand then shutsoff. i noticed that the blower motor doesnot come on. I just replaced the limit switch, code 4, to get the unit to lite off but nw have this probem. ther is supposd to be a ret switch but i cant find one. am i missing sometkhing obvious? any suggestiohs welcome.