Refrigerator help

Frigidaire refrigerator model number FRT21LRG, about 5 years old
Freezer on top
The fridge started making an occasional humming noise about a week ago. At first I thought it was just something vibrating, but then it started to do it more often. On Monday it started to do it quite a bit, and I noticed the freezer was thawing out. Pulled the fridge out from the wall and noticed the humming sound was coming from the compressor. It will hum for about 5-10 seconds, and then it's quite for about a minute...then hums again for 5-10 seconds... Unplugged the fridge for an hour, and plugged it back in. All was fine for the next 12 hours or so, then it started to make an occasional humming sound again. Now I am having to unplug the fridge every 6 hours or so. Father in law says it's the defrost timer...I think the compressor is going bad. If it's the defrost timer...wouldn't it be stuck in defrost mode or non defrost mode..i.e. the compressor would either be on or off the whole time. I think the defrost timer is turning the compressor off every six hours, like it should, and then the compressor is not able to come back on like it should. Only after cooling down for an hour is the compressor able to come back on.
Any ideas?
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fsds snipped-for-privacy@yahoo.com wrote:

Hi,
Compressor certainly -sounds- like it is going sour!
Clicking/buzzing on and off is the compressor trying to start, but cannot. Normally would check the compressors amp draw with an amp meter as one test.

For the most part, yes.
jeff. Appliance Repair Aid http://www.applianceaid.com /
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ifyour cooling fins are clogged it may be hard on the compressor
http://www.minibite.com/america/malone.htm
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