How to Troubleshoot & Replace Whirlpool AP6009255 / WP4356840 Freezer Door Lock Key

I ordered a new key. It worked perfectly. Lots of places were offering Whirlpool refrigerator keys that had a pentagon shape, however I needed a key with a cross pattern. Entering the model number of my refrigerator on this website resulted in the correct key for my refrigerator. 

Inside door panel must be loosened, but not entirely removed. Simply remove 2/3 of the screws at the top and down both sides. Work the old gasket loose, let it hang while you install the new gasket from the top, and replace half of the screws to hold a new gasket in place. Continue removing lower screws, remove and discard the old gasket, then fit the lower half of the new gasket into place and reinstall remaining screws in the lower half. The new gasket had been folded and required a little time in the sun to relax and unbend a little bit. A P P Is the best! I have saved hundreds of dollars in repair costs and thousands in appliance costs. 

Corona virus pandemic happening. While others bought & hoarded toilet paper, this former Girl Scout found a gently used upright freezer for $50 and filled it with food so I would not need to grocery shop as frequently as normal. The freezer is in pristine condition, but it's almond color tells me it has a few miles on it. It was the 'spare beer box' for a retired couple who are selling their home. I cleaned it up inside and out. At 19.6 cu ft it holds at least 1 month of frozen dinners and almond milk. It's key for the lock was long gone and the front lower 1/3 of it's face had faint red spray paint on it where someone had sprayed something close to it in the past. I had a problem locating a key AND a can of almond colored spray paint to make it storeroom gorgeous again. The only part, no longer available was the drip pan but I improvised with an old cookie sheet pan. I use this biz for any appliance parts I need. It is a no fuss, pay with a credit card deal every time. I got the parts in 3 days via FedEx, packaged securely. I absolutely will use them again. 

Ordered keys from appliancepartspros.com. It works fine.