Why metal rack can be used in the combination mode?
In the combination mode, the microwave is used only for a short duration in the microwave mode when metal rack cannot and shouldn’t be used. The rack has no sharp edges and the gap between the rods of the rack is large enough to prevent sparking and to allow the microwave to pass through. Please note the grill rack is only to elevate the food to come closer to quartz heater element for faster browning.