A few minutes and automatically return to work, and so forth. The analysis should be judged on the hot magnetron cutter malfunction caused. When the furnace chamber temperature rose to 145 ℃ thermal cutter to cut off the power supply to the magnetron; When the temperature drops to 110 ℃, the thermal cut again closed, microwave oven magnetron was electric and heating work. The machine is only a few minutes of work, and the food undercooked, oven cavity temperature does not exceed 145 ℃, it is believed that poor performance thermal cut malfunction. After replacing the new, troubleshooting. In the maintenance of such failure, should take into account the cooling fan is working, if the fan does not rotate, the heat did not break out, resulting in temperature, can also lead to thermal cut-work, cut off the magnetron power.npUservice manual download site