A:Answer Usually the charcoal filter is located behind that flat plate above the door, which is the front of the vent port, but a few may have them behind the silver grates on the bottom. Check this first before proceeding to the upper area of micro. You'll need a step stool and a phillips screw driver or cordless drill. I find the cordless is better because it does the work for you and has a magnetic tip. Be careful not to drop screws into vent or it may be hard to get them out. Don't go crazy with the drill, just ease them out. First, open the micro door wide. Just behind the vent port there should be 2-4 screws on top of unit (almost up against the cabinet frame) that look like they hold the unit casing on. Removing them should allow you to remove the vent cover and the filter will be behind it. Some filters clip in and some just slide in. Be very careful removing the vent cover as well, because sometimes they only have plastic tabs or clips to realign upon reinstallation, and they could break off. Some vent covers pull out, some slide sideways before removal, and sometimes the door itself will make it seem tough to remove the cover. Just take your time and all should be good. I would recommend pulling a PDF file on this model if you can't find your install manual. It should show you step by step how to do this. If you're uncomfortable doing this, please call a technician the first time and watch them do it first. Hope this helps.