Bosch customer service (available only daylight eastern time) could not identify the code over the phone and required an authorized service agent. That rep came out and identified a fan sensor error. He replaced the sensor and the oven failed in the same way a few days later. He returned, and replaced fan and board. The oven worked until September (another 5 months) and failed with same error.

I called Bosch and asked what they intended to do with multiple repeated failures, and what service they would provide when my 1 year warranty expired. Got a manager on the phone, who said that they would handle this on a case-by-case basis after the end of warranty (i.e., they would decide at that time whether to back the product against these defects). He suggested that I purchase a 5 year warranty. This is unacceptable. An oven clearly should have a trouble free life span of more than four months.

The retailer (http://universalakb.reachlocal.com was much more ethical and responsive and assured me that if the problem continued, he would give me an exchange or replacement, or at least a free five year warranty.

Check out the interesting reviews at http://www.my3cents.com/productReview.cgi?company=Bosch. I wish I had done so.

caveat emptor