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Refrigerator what should the low side refrigerant pressure be on a refrigerator while it is running

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0 to 3 pounds is normal. Much higher than 3 pounds would most likely be a weak compressor. A vaccum would indicate out of freon/leak or a restriction.

Posted on Jul 14, 2008

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Low pressure on suction side and no cooling


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Not cooling, compressor is running but both lines are warm. fan is running also.


Check refrigerant pressure, if below 0psi (hg), need refrigerant, if not work before you charge up to 1.8 to 3 psi may be you has an escpape in the condensor internal lines, you can do this with 3 in 1 valve to refill and check the low pressure side

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A/C compressor does not kick on...Compressor OK !!!. Thanks Juan


If the refrigerant level is low (or if it is too cold outside), the system pressure will not be high enough to cause the low side pressure switch to turn on the compressor. Check level of refrigerant by making sure there is at least 40 lbs pressure on the low side when the compressor is not running.

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1 Answer

Where is the low pressure ac valve?


FOLLOW THE REFRIGERANT LINE LEADING FROM AC COMPRESSOR TO EVAPORATOR TO THE BACK FIREWALL LOOK FOR REFRIGERANT LINE WITH BLACK OR BLUE CAP THATS LOW PRESSURE SUCTION SIDE..WHEN HANDLING REFRIGERANT WEAR SAFETY GOGGLES TO KEEP REFRIGERANT GETTING INTO YOUR EYES.WHICH CAN CAUSE BLINDNESS OR DAMAGE EYES.YOU NEED A LOW AND HIGH PRESSURE GAUGE.OR MANIFOLD GAUGE SET.LOW SIDE PRESSURE SHOULD BE 28 PSI AND HIGH SIDE SHOULD BE 200 - 220 PSI.

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that back pressures sound high to me and the hi side sound low may have a bad compressor not pumping right should run around 0 to 5 low 125 to 150 hi hope that helps

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1 Answer

What is the high and low side pressures on the 134A compressor of my amana side by side refrigerator / freezer?


Good day,
The low side (suction pressure) is pretty nominal at 2 to 4 lbs.
The high side should range from 120 to about 14 lbs. depending on load and ambient temperature.
This would be after 15 minutes running time. Doors closed. Rear panel on as well as can be attached with gauge hoses protruding.

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1 Answer

Need low side freon pressure for GE refrigerator


while running you should be around 2 to just above vaccum
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1993 buick century


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MY AIRCON OUTDOOR MODE IS ON...AND ITS NOT COOLING


Apparently the outdoor fan is on.
Verify that the compressor is on.
Could be a bad capacitor or a bad compressor or justb a bad wire.
Check the refrigerant charge.
Low refrigerant= no cooling.
If the compressor is running refrigerant pressure on the low side (suction side)should be at least 68 pounds of pressure.

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