I can see that Toyota subcontracted out this HVAC conrol to
"Sumitomo Electric". They produced a sub par in quality item.
Although a bad design, It is a money maker for Toyota.
It's quite amazing that this item fails consistently
after warranty is up!!!!
Question: If this control is responsible for the defroster settings, would that be considered a SAFETY Issue?
If yu can't see out of your windshield due interior fogging and/or exterior winshield frosting, I would see that as a SAFETY ISSUE!
A vehicle defroster which is part of the HVAC system IS required equipment for ANY vehicle.
Temp adjustment needed for any defrosting system!!!!!
My spin...
LT