Only to observe the microwave oven door after work properly locked, the purpose of this design is to ensure that no leakage of microwave wounding. When you close the door by a door hook (up and down each one, along with one) lock on the door and realized the first and second interlock switch is connected to the circuit. Check the two doors open hooks intact, but struck his hand on the door hook up feel, the next move without damping sense, the reason may be the door hook spring break or fall off. Carefully pry the plastic door seal, observed that the spring has come off, after two spring hook mouth deformed (widened), spring hook with needle-nose pliers to clamp the narrow mouth of the proper installation of the recovery, replace the plastic door seal, placed in a glass turntable glass filled with water, shut the door test machine, everything is normal.ZMbservice manual download site