How to Troubleshoot & Replace Whirlpool AP4299859 / W10113040A Grease Filter

I replaced the screen filter (by sliding it to the rear), and then removed the filthy charcoal filter. Then I slid in the new charcoal filter and replaced it with a new screen filter. I repeated the other side. A piece of advice: the screen filter (silver one) comes with one per unit, where as the charcoal filter came with two per unit. If I had known, I would have purchased one charcoal filter (as two come in a pack). In a way it was a win-win situation because I now have a charcoal filter for next time it needs replacing:) Thank you. 

The parts were a perfect match and installation was easy. 

Ordered replacement parts. 

Simply installed all the parts we ordered. 

Took out the old filters and replaced them with new ones. 

Ordered the necessary parts. They were delivered within two days. 

Replacement. 

OMG this was the best experience ever!! Thank you so much!! As all the other reviews for microwave covers say all I had to do was follow the included instructions- unscrew the right screw put in the little latch, screw back on and attach the assy. It took all of 2mins and I spent 1 full minute looking for the screwdriver ???? I also got brand new charcoal grease filters and silver filters and I gotta tell you after cleaning it all out with simply green I feel like I have a brand new appliance! Thanks so much for the lightning-fast shipping too!! It took all of 24hrs to arrive!! Amazing!! 

Replaced filters with new ones. Fit and are working fine. 

Replaced it.