Question about Kenmore 53642 / 53644 Side by Side Refrigerator

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Compressor noise and shutoff

Hello, I've previously posted this problem but I am still working on it. Here is my progress to date. The starting cap is good (15.5uf). The current draw from the compressor is 9.6A before shutoff. The relay does get warm for the few seconds it is on. I plan on ordering a new start relay today but I was hoping for a warm fuzzy from the experts before doing so.The fridge is 7 years old and out of warranty. Relay P/N 218721119. Thanks

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No expert here, just another victim.

Have you experienced anything like power disturbances shortly before this problem came up?
We lost a compressor some years ago due to a 'low-line' condition (~20-25 VAC) while we were gone from home and tha is not enough to start the compressor but is was enough to fry it.
It never ran again.

Can you see that the compressor shudders when trying to turn on?
This would indicate that it is starting up but if you see no movment (the suspension whould allow some) then it isn't even trying and could be seized.

The current seems about right, placing the power at ~1100 watts but all modern compressors will have thermally protected motors that will limit current in case of such a seizure to prevent fire.

The dropping out after startup kind of suggests that the current draw is monitored and limited so that if it fails to start, it can shut down again.

If used as in most normal motors, that the start capacitor supplies a phase-shift to a serarate winding that is shut off after spinup, instead of a centrifugal switch, they are just using a relay.
The effect would be the same.

Posted on Jul 10, 2008

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