Interesting. You don't show a pic of the old PCB that you removed?
I opened up my 2011 Autosave model, and it appears that the PCB it has -part 208428 has been superceded by the part you show - 208700, but these PCB's are different, in that the components on the old part sit in the actual airpath of the exhaust air, whereas on the new part, 208700, the main components are on the other side, out of the airflow path.
I'm wondering if the carbon dust from the motor exhaust gets over the components of the old type boards and causes them damage, and possible shorting out? just a thought?
This is the old type board - note that the wire connectors are on the back, so that the main parts of the board are facing into the exhaust air flow
[ATTACH=full]62179[/ATTACH]
