Product review (1 stars): Apparently a defective product
The microwave portion of the walloven combo failed after 13 months.  The micro wave will not shut off unless the door is left open or the breaker is opened.  Apparently this is not uncommon and the problem is due to internal wiring and the control board (according to GE).  Estimated repair according to GE is $300.  GE will not budge on the 12 month warranty.  Mine failed at 13.5 months.  I did some research and they are having problems with their microwaves.  Things breaks but when the problem is attributed to a control board and internal wiring with 13-14 months of a GE warranty and they won't help, that is just poor product support and frankly service.