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Good day, We're awfully sorry to hear that your microwave was running when the door was closed and understand how concerning that is. If an over-the-range microwave comes on by itself (fan & turntable running), first determine whether it is running and heating, or whether just the fan and lights are coming on. To Test: Place an ice cube or water (cool or room temperature) into a microwave safe glass bowl or mug and close the door. Allow the unit to run on its own for 1 minute. Heating While Running On Its Own If the cube melts or if the water gets warm it means the magnetron tube (heating mechanism) is coming on. UNPLUG THE MICROWAVE and contact service. You can schedule an appointment by calling 1-800-432-2737. Not Heating While Running On Its Own If the cube does NOT melt or if the water does NOT warm it means the magnetron tube is not coming on and it is only the fan operating. Your next steps depend on whether the fan and lights are on or just the fan: Only the Fan Stays On (light is OFF, hearing the microwave running): The fan may come on by itself whenever there is heat near the microwave; the fan cools the components which protects the life of the microwave. This is normal. Heat reaching the microwave can be caused by: cooking on the cooktop or oven beneath the microwave or multiple or extended use of the microwave within a short time span The fan will run up to 2 hours to keep the components cool and will then shut off on its own. This is NORMAL and working as designed. Fan and Light On (hearing microwave running): When replacing the charcoal filter, the filter may not be seated properly. When you reseat the vent cover, the improperly installed charcoal filter can cause the vent cover to sit askew, slightly obstructing the door closure.This can cause the light and fan to come on by themselves. To correct: Open the door, Remove the vent cover, Seat the charcoal filter properly, Reinstall the vent cover with no gaps between the cover and the case of the microwave. We hope this information helps. Stay well! Mike@GEA
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