Thermador / Wall Hood
The product is one of Thermador's Professional series wall hoods, model PHE42US. We have had it for just over a year (the warranty period) and last week it started to run on its own intermittently for a few seconds. You cannot turn it off manually while it is doing this. I disconnected the power to the blower and the power switch still flashes intermittently indicating that it would run again on its own.
All Thermador would do is to refer me to a local repair service, after all they have my money for what they sell as a premium product. We have an entire kitchen of their products and have had problems with the induction cooktop and had difficulty in getting assistance from Thermador in determining how to trim out the botton of the refrigerator and freezer.
Bottom line is you should think long and hard about buying anything from Thermador. Our experience with mearly $20, 000 of appliances has been very poor.