I replaced the flame sensor with success and no issues as covered in the topic "No Sustained Flame". The furnace have been idle for about two weeks, now we have 90*F temperatures. So last night I put the stat on auto/cool to cool the house. Cool air was coming out alright but with it a smell of a burnt circuit board, not a burnt wire. It's like when a TV goes south. I put the stat on Fan/off (just the fan) and the smell is not there. Fan runs ok but I don't know if it's in lo or hi speed. Was told it's the blower motor, but it blows. Any ideas?