Donald M Stover , MO March 13, 2015 Appliance: Maytag Refrigerator ATB2232MRW00 Maytag Refrigerator Atb2232mrw00: Erratic cooling ice buildup in freezer. How to replace Cold Control. I replaced the Thermostat and Defrost Timer. It was a fairly easy repair other than removing the old Defrost Timer. The way the manufacturer, in this case, Amana, mounts that unit with "clips" is just poor design and engineering. It is virtually impossible to get the timer out without damaging the mounts. I had to do some creative rework to mount the new timer. After 2 days, the fridge appears to be working properly with these new parts. The new parts were shipped Very Fast...APP is an excellent company! 11 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: 1-2 hours