I followed the advice of many people with the same problem, and replaced the Defrost Thermostat and Defrost Timer. Both repairs were relatively easy, and the problem appears to be solved. The replacement of the Defrost Timer is very easy (about 30 minutes), and I wish I had stopped at that step and waited 48 hours to see if that fixed the problem. But, I wanted to replace both parts that I had purchased - - In my refrigerator, access to the Defrost Thermostat is through the back of the freezer panel. Not too difficult to get to the area, but I had a bit of a problem in replacing the part, and might have been better-off to see if step 1 fixed the issue. The problem that I ran into is that I don't have a crimping tool, and crushed both of the connecting sleeves when trying to 'crimp' them with a set of wire-strippers. Rather than to invest in a crimping tool, I connected the wires and sealed with electrical tape - - Now that the issue is resolved, I will likely re-open and use a proper connecting sleeve (with a proper crimping tool). My advice is to buy both parts, and replace just the Defrost Timer first. Chances are good that it may fix your problem, and you are only out $20 for the second part, which you can leave in your junk drawer until you may need it some day! All in all, it was a great way to spend $40 and avoid a costly service call!
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