I have a small lennox model number GCS29X-030-75 problem is that the circuit board is fried...I have two problems who sells lennox parts in so cal L.A. Area???can you only get them from lennox?? and the schematics from lennox stink and are hardly readable..does anyone know any info about how to get a schematic??Im tring to find out what fried this board...any ideas...Im embarrassed to ask these questions but I normally do not work on residential units let alone lennox..Oh yeah is my neighbors unit..Thanks in advance for any info..