Toughest part of this repair is figuring out how to get things apart. Amana doesn't provide you a repair manual showing how to disengage the various plastic covers. Initially disassembled the bottom freezer compartment so I could get to the evaporator coils; they were completely frozen in block of ice, restricting air flow to the fridge above. Obviously, the auto defrost cycle had not been running, or was short-cycling. Manually defrosted. Found this link for running diagnostic tests on the JAZZ control board: http://applianceassistant.com/Refrigerator-Repair/W10503278-Refrigerator-Control-Diagnostics-Repair.php. Useful set of tests. Defrost circuit test passed, but defrost obviously not working, so suspected control (JAZZ) board [high failure item based on other reviews]. Replaced JAZZ board, but to be on the safe side, also replaced both thermistors and the defrost thermostat while I had everything apart - hence the long repair time. Appears to be working again now. Control board was actually the easiest part of the repair, once I figured out how to get to it. For others with this model: 1) Remove light cover by sliding it toward the back of the fridge; 2) remove the light bulbs; 3) Open control board compartment by using flat-blade screwdriver to disengage two plastic tabs on back side of compartment (this is the tough part); 4) Cover will hinge down and you will now see the control board (and the fridge thermistor, should you choose to replace it too); 5) Note how the old board is actually two pieces, the display being connected by a ribbon cable to the main board - when you get your new board, it will be flat - you need to very carefully separate the display along the scored line on the board to extend the display cable and orient the display properly - be very careful and support the main part of the board on a solid surface while you gently flex the display portion to separate it; 6) Disengage old board and display from holder by releasing retaining tabs one for each section; 7) Center new board on the supports and engage retaining tab; 8) Reassemble everything by reversing steps 1-4 and you're done. If you choose to replace the temp sensor (thermistor), you will need to cut the old one out and splice the new one in (wire nuts are supplied in the thermistor kit), but the control board is much more likely to be at fault based on all the reviews I have read. I ran resistance checks on both of the thermistors and the defrost thermostat I replaced, and they all checked out good - I could have just done the control board and probably solved my problem, but we don't have a backup fridge and I didn't want to disassemble everything a second time.