Kevin H Casper , WY December 23, 2014 Appliance: Model C272BW/01 F64 error code thermador double wall oven m# c272bw/01 The code denotes a bad blower or air switch sensor. On this oven however, the air switch is actually a HALL Sensor and is part of the lower oven cooling fan assembly. Older ovens have a separate air switch. We removed the oven, replaced the blower assembly and the unit is good as new!!! Customer is Happy!! Read More... 27 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes Tools: Nut Drivers, Screwdrivers