My bus has a rarely used older unit that ran perfectly until last week. I noticed that during the cycle to start the compressor, it slowed down for about 10 seconds, compressor does not start, then fan resumes normal speed for a couple of minutes. it then lugs down again (fan also) for the 10 seconds or thereabouts, thens resumes normal fan operation for a couple of minutes or so. Its like it cycles for the compressor and when it doesn't start, it waits a certain period then does it all again. I was working in the bus when it did it and noticed it immediately.It worked so normally I have a hard time thinking its the compressor.
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Re: compressor wont start
It is probably a failed run capacitor for the compressor. Without the capacitor, the motor can't even try to run, but it will draw extreamly high amperage until it trips the thermal overload (avarage trip time 5-10sec) after it has a few second for the safety to cool off, it will try again. Either that or the compressor truly is seized
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Unless the machine is over 25 years old or is being used more frequently than once a day I would maintain the machine doing as many repairs as possible myself or if available have a reasonable repair service I would still consider maintaining the machine. I'm amazed at the reliability of the older units.
Many of the repair parts have had the corrections made to prevent them from failing for the same reason. This will increase the reliability of the older machines. Also in general the older units are less complex (less things to fail) and easier to repair. You should expect that a newer machine, using significantly more complexity, uses less water and electricity to achieve the same cleaning performance as an older machine.
The control electronics have an indefinite life meaning they fail for components on the board not because they wear out or get old. The likelihood of a new/replacement board failing is consistent with the likely hood of a brand new machine failing. As the control boards age they are less likely to fail.
Using u-tube and fixya and other sources of repair knowledge the older machines have a wealth of experience to bring to solving the problem The newest technology machines will have to go through the learning curve.
The question is will a new machine perform the job significantly better than the unit you have.
First of all, clean your outside coils so that you are assured of good cooling air. The compressors have an overtemp device that is usually internal to protect them against heat. If you have an air compressor use it to blow out the coils good. If the compressor will start, the capacitor is good so it sounds like a cooling problem with the compressor
Hi, It is the compressor. The compressor is a pump inside the housing you see under the refrigerator. The pump sits on some springs inside this housing and one of the springs has gone bad. When the compressor shuts off, there is back pressure and the noise you hear is the pump hitting the housing because that sprig is broke. There is no fix other then replacing the compressor. It is very costly to replace. If this refrigerator is older, I would recommend you start looking for a new refrigerator. The noise could last a while but, it is a sign the refrigerator will not last much longer.
I hope this helps you understand what is happening.
It could be the
defrosting clock usually positioned at front bottom behind the removable
grill or in the back. This clock times the running and defrosting time, so if stuck on run it will never go to defrost cycle and the ice piles up.It has a one way slotted fit. Use a wide flat screwdriver to
slowly turn the dial until compressor stops, (defrost cycle) this will not only stop compressor, but also turn on that tube heather you where talking about to melt ice off evaporator. Then wait (up to 30 minutes) to see if starts up
again(run cycle). If it does not, clock needs replacement. You can then turn clock again slowly to turn compressor back on so you can use fridge until repaired. You can do this off and on daily to manually defrost unit until repaired. If this is not your problem it could very well be the heather tube, but they rarely go out. Best I can do without being there, hope it helps you. Frank