Author Topic: GE refrigerator GTS18IBMBRWW  (Read 769 times)

Offline go400

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  • Member Since: Feb 2013
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GE refrigerator GTS18IBMBRWW
« on: April 09, 2013, 05:59:04 PM »
This is a strange problem.
 Refrigerator will run ok until it shuts off. After a period of time, after the pressures have equalized, when you turn it on, the compressor will oscillate with
about  .2 second intervals for about 3 or 4 tries till it finally runs.
 The compressor temperature is abnormally hot, around 130 degrees.
 One conclusion is a weak run winding and it is cycling on the ptc device. Another is a partially shorted start winding as it really jerks
 the compressor on it's mounts when it oscillates as the klixon is shutting it down momentarily on high current.
 I tried a new klixon, but that didn't fix it. Will try powering it externally to eliminate other problems.

Offline domain

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Re: GE refrigerator GTS18IBMBRWW
« Reply #1 on: April 09, 2013, 08:26:13 PM »
Very strange. In for what you find! 8)

Offline go400

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Re: GE refrigerator GTS18IBMBRWW
« Reply #2 on: April 10, 2013, 08:02:26 AM »
I have not looked at it today, but I think the start winding is partially shorted. It can't be totally shorted as it has starting torque.
 There are two ways a klixon can trip out. If the current is very high (more than 30 amps) the klixon will
 trip out within a 100 milliseconds, but it has not heated up much, so it closes in less than 100 milliseconds.
 The second way; If the l overload current is around 20 amps, or less , the klixon takes several seconds to trip out and due to it's
 higher temperature, it takes up to a minute to turn back on.
  Also, in this high current case, the ptc device still has not raised it's resistance to limit the current, so the compressor just oscillates till the pressures
 become more equalized.

Offline go400

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Re: GE refrigerator GTS18IBMBRWW
« Reply #3 on: April 10, 2013, 08:21:32 AM »
Correction;
 I tested a klixon that most refrigerators use and it trips out around 20 amps within about 10 seconds and as you lower the current it takes longer to trip out. As the compressor heats up, it's temperature rise lowers the trip out time.

Offline go400

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Re: GE refrigerator GTS18IBMBRWW
« Reply #4 on: April 10, 2013, 12:55:37 PM »
Found the problem. Apparently all the compressor springs are weak and the compressor bounces around for a period.
 The compressor is overheating and is inefficient, struggling to keep the freezer below 20 degrees. This added to the confusion.

 

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