Rex W Sheridan , WY March 24, 2015 Appliance: Amana Refrigerator ARS2664BW The frost was building up on the evaporator and the freezer wasn't cooling very well I removed the shelves and the shelf holders, took the back panel off, loosened the evaporator. Removed the heater element and the thermostat. Re-installed the evaporator the back panel, shelve holders and shelves. Then I located the defrost timer in the refrigerator. Read More... 13 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes Tools: Screwdrivers, Socket Set