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High side can be caused by restricted or blocked condenser coil, or fan not working. Or air in the system.

Posted on Mar 05, 2009

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Posted on Jan 02, 2017

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What is the gas pressure on both compressors on subzero 321

The pressure of the refrigerant in the systems vary depending on the temperature of the refrigerant gas and the type of gas used. So this is a question that can't be answered without a lot of additional information.

Mar 02, 2015 | Refrigerators

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Sears june 93 fridge stopped dead 20+ hrs now running why

Hello Suanne;

My name is Peter. I am a retired field service refrigeration technician.

When you plug in a new refrigerator it takes the refrigerant 24 hours to equalize, create a high pressure 160 PSI liquid side and a low pressure 60 PSI vapor side.

I have never experienced this before. I think you are very lucky. I suspect you may have had a restriction in your refrigerant system and it cleared itself.

Or, your defrost timer may have gotten stuck and freed it self after repeated attempts to start and stop.

Look in your freezers upper right hand corner. Is there ice or heavy frost buildup? This is where most restrictions occur.

Nov 07, 2014 | Refrigerators

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Low side pressure at 88 high side 600

Condenser fan not running, condenser plugged with dirt or grease, over charged with refrigerant, refrigerant metering device plugged or failed, air in the refrigeration system, extreme temperature around the condenser, mixed refrigerant charge.

Jan 13, 2014 | Traulsen ADT132WUT-HHS Stainless Steel...

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I have a Traulsen walk threw refrigerator Im getting a high pressure of 600 and a low pressure of 80 and cant get it to cool down, do I need to pull the system down or try something else

Hi side is too high. Look for a condenser plugged with refrigerant oil or the fan not spinning up to speed. If it was serviced recently there could be air in the system or a flake of copper oxide clogging the orifice tubes in the evap.

Jan 13, 2014 | Traulsen Refrigerators

1 Answer

I replaced the compressor on my refrigerator. There were no tags as to how much freon the system takes. So I added enough to bring the low side to 72 psi w/ a cabinet temp of 70 degrees. The high side...

**** boy. 72 psi on the low side? It ain't an air conditioner. The low side should be never over 5 PSI. The whole system holds only arounf 4 ounces. What were ya thankin? LOL WOW you will be lucky if the reed valves ain't blown in the new compressor. Go ahead and evacuate the system. Pull that ****** down to as close to negative 30 as you can and then shut her down. Just crack open the freon a hair and let it SLOWL:Y build to no more than 5PSI on the low side.

Feb 17, 2011 | Refrigerators

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A M-G20010 keeps freezing coil every sevral weeks.

make sure doors close and seal all the way. are the doors being open constantly and in a high humidity area?
Is the set temp too low? How many defrost per 24 hours. Should be 4 and about 20 minutes each cycle.
Start there.
Hope this helps and let me know if I can be of any more help.

Oct 28, 2009 | Traulsen G20010 Commercial Refrigerator

1 Answer

I have a kenmore side by side refridgerator and to make a long story short I am not sure what the low side pressure needs to be when running

It should be between 25 and 30 psi and the high side about 160 psi (only with the r134 refrigerant).

Jul 26, 2009 | Refrigerators

3 Answers

Want to know operating pressures on a 134a refrigerator low and high

Maximum efficiency is achieved when there is the greatest difference between high side and low side provided the low side stays under 30 psi or so. The low side pressures must stay low enough to cause the refrigerant to change states in the evaporator. If you see frost on the compressor suction line, there's too much refrigerant, and you'll overload the compressor. The correct approach, if you have the equipment and it sounds like you must have a gauge set but you need recovery to do this right, is to evacuate the sealed system, (a tight system will hold a vacuum overnight, but an hour is a good test if you suspect any leaks) and refill with the exact amount of refrigerant (by weight) as indicated on the ID tag.. Any system that will not perform when filled to that specification has either a bad valve in the compressor, or a restriction caused by contamination. Contamination is usually from moisture (humidity) introduced into the system by improper servicing, but is usually relieved if the system is under vacuum long enough to boil out the moisture. If the compressor is the culprit, it's usually game-over.

May 30, 2009 | Electrolux Refrigerators

1 Answer


The cap tube is clogged and the unit is overcharged. Get used to this on beverage air units.

Nov 18, 2008 | Beverage-Air Beverage Air 2- Tap Unit...

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