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Compressor Problem

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The compressor runs the same with or without the Run Capacitor, is this normal? The compressor in this unit is

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  #1 (permalink)  
Old 05-03-2017, 08:03 AM
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Question Compressor Problem
Model Number: W8RXEGMWB01   Brand: Whirlpool   Age: 5 - 10 years   

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The compressor runs the same with or without the Run Capacitor, is this normal? The compressor in this unit is a EMBRACO EGX 70HLC the data sheet with this unit states "Refrigerant Charge Must Be Applied To HIGH SIDE ONLY". Everything I have read says you add coolant to the suction side, what is correct?


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  #2 (permalink)  
Old 05-03-2017, 09:24 PM
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The run cap helps get it started, if there is low head pressure it is not always needed to get comp moving.

As for adding refrigerant; that depends on who you ask and how they do it. Sweep charge or deep evac. You can add vapor to the low side with running compressor (process tube), or if you're pressing your luck very slowly add liquid to same port. Normally the comp chugs a little as it eats the liquid and it's ok, but it's a large risk I don't take. To add liquid to high side you'll need a tank at higher pressure or a system in deep vacuum with comp off.
I prefer vapor into low side process tube with running compressor and a heated tank. It's slower but easier (I think) on the system. Some guys add liquid to process tube slowly, I figure if I damage a valve in the comp just to save 5 minutes I'm going to be really pissed off.
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Old 05-04-2017, 05:54 AM
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Thanks for the info.
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Old 05-08-2017, 08:04 AM
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How Do I Know If I Have Damage A Valve
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Old 05-08-2017, 09:13 PM
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Noise and temps of output line/condenser is a good sign but to be more certain you'd need to tap the sealed system and get pressures. There are valves inside the compressor that allow it to build pressure (compress). It is not serviceable, it's hermetically sealed.

But I'm confused, why are you interested in adding refrigerant? It's a sealed system, if it needs refrigerant added it has a leak. Adding some might buy you some time but that's it.

This is not the kind of thing a homeowner can do unless there is already an access valve installed (on high or low side) and they have a supply of virgin refrigerant and a scale to weigh it in at a bare minimum. You should also have gauges, a vacuum pump, a recovery pump and tanks to do it right. If it has been worked on before there will be an access valve on the process tube (low side=short stub on compressor) and the filter-dryer(high side-with the thin capillary tube in one end). Sealed system diagnosis and repair is not a casual task, I work with guys who can't get it right after a decade of trying. I can still make mistakes after 20 years of doing it.

Is the system not cooling or otherwise exhibiting signs of a sealed system issue? I'm not sure what the point of your question was I guess.
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