First, I love the oven portion of this appliance. That said, I do not care for the microwave. After 8 months of use, the controls have intermittently stopped working. This is usually after heating something up. It does not matter if it is 30 sec or 5 min. All controls become unavailable for an indeterminate amount of time-it may be 2 min or 45. I have followed all of the troubleshooting procedures to no avail. I have had an electrician check and It is not a power issue. That leaves me to assume that the circuit board or the internal power module is faulty.