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Low Side Pressure Going Into Vacuum. It is located in the evaporator housing at the evaporator. Its a Copeland semi-hermetic compressor running 404a. It looks like you need the expansion valve. Those that appear to be stuck closed may have inlet screens clogged with ground up desiccant particles.
Charging Refrigerant Through Suction Valve Archives Refconhvac Com In 2021 Refrigeration And Air Conditioning Hvac Diy Hvac Maintenance From pinterest.com
We added them into the system and found out that the high pressure side was at 130 psi and the low pressure side was pulling a vacuum of -20 psi. That is what controls the low side pressure. When a pressure gradient exists particles from a higher pressure area rush into a low pressure area. Really need more info. Low pressure readings decrease or a negative reading is shown. AC low side pulls into vacuum.
To his knowledge the low pressure side should be reading 30-35 psi.
Vacuum to 29 hg in a vacuum. Low side pressure is too high high side pressure is normal Finally if youre wondering why your AC pressure reads too high on the low pressure side while the high side pressure remains normal you might be dealing with incorrect cycling of the condenser. AC compressor goes on and low side goes into vacuum. It is a brand new compressor and the are unrestricted. The compressor just doesnt sound right. If it is simply a charge issue you can tell by sticking your hear in the truck and have someone start the system if you hear gas hissing through TXVs your low.
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We added them into the system and found out that the high pressure side was at 130 psi and the low pressure side was pulling a vacuum of -20 psi. If youre finding that when you measure the pressure on the low side of your AC and its coming up above 100 while the pressure on the high side is down around 150 or lower then you have a problem with the low side being high and the high side being low. Compressor turns off then slowly goes back to about 30 psi. Shut it off and low side very slowly returned to 100 after 30 minutes or so. That is what controls the low side pressure.
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Air Compressors Upright Vacuums Building Supplies. It is located in the evaporator housing at the evaporator. When it fails it will put the low side into a vacuum. I have a problem with the AC on my 2001 626. At this point the system should be checked by a professional who will evacuate the system and change the drier.
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The problem is that the suction side keeps going into a vacuum while my high side is running at 215 psig. Ive checked my LLS and the TXV both are operating and. Low pressure readings decrease or a negative reading is shown. This happens when there is an unusually rapid cutting in and out of the cycle. When this freezing occurs the low side pressure will drop eventually going into a vacuum.
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High side is 100 low side is vacuum about 20 inches. Low side is vacuum no pressure on high side. The low side may even draw into a vacuum. Clean or replace expansion valve. Clogged or blocked piping.
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Clean or replace expansion valve. Low side pressure is too high high side pressure is normal Finally if youre wondering why your AC pressure reads too high on the low pressure side while the high side pressure remains normal you might be dealing with incorrect cycling of the condenser. They suggested 2 possible causes. Clogged or blocked piping. It is located in the evaporator housing at the evaporator.
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Cold plates take alot of refrigerant and you may simply be low on charge. Im guessing there is a restrict somewhere. We added them into the system and found out that the high pressure side was at 130 psi and the low pressure side was pulling a vacuum of -20 psi. Air Compressors Upright Vacuums Building Supplies. The symptoms of internal freeze up often surface after extended highway driving.
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The problem is that the suction side keeps going into a vacuum while my high side is running at 215 psig. Clean or replace expansion valve. Expansion valve and compressor already replaced. Report This by Manage My Life. The compressor just doesnt sound right.
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Shut it off and low side very slowly returned to 100 after 30 minutes or so. AC compressor goes on and low side goes into vacuum. Pulled vacuum to almost -30 psi inches Hg observed that level held for 1 hour. The low side should be 25-30 rock solid no variation. You may have heard the phrase nature abhors a vacuum Imagine a closed box with a gas in it with an initial state where all the molecules are in one corner of the box trapped by an invisible force field.
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Compressor is running but not pumping freon thru sight glass. Once it reaches 29 hg in a vacuum continue running the vacuum pump for an additional 20 minutes an hour is fine. Low side is vacuum no pressure on high side. AC compressor goes on and low side goes into vacuum. Gauges will show very low suction side pressure along with lower than normal high side pressure.
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It is located in the evaporator housing at the evaporator. Get more answers from the people in your networks. The problem is that the suction side keeps going into a vacuum while my high side is running at 215 psig. At this point the system should be checked by a professional who will evacuate the system and change the drier. My mechanic did some diagnosis today determined that at startup the high and low pressure sides of the system are OK but once the engine rises to normal operating temperature the low pressure side goes to vacuum.
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You may have heard the phrase nature abhors a vacuum Imagine a closed box with a gas in it with an initial state where all the molecules are in one corner of the box trapped by an invisible force field. Gauges will show very low suction side pressure along with lower than normal high side pressure. Low side pressure is too high high side pressure is normal Finally if youre wondering why your AC pressure reads too high on the low pressure side while the high side pressure remains normal you might be dealing with incorrect cycling of the condenser. Cold plates take alot of refrigerant and you may simply be low on charge. The volume of air stays constant but the temperature of the air gradually rises.
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Compressor turns off then slowly goes back to about 30 psi. The compressor just doesnt sound right. If youre finding that when you measure the pressure on the low side of your AC and its coming up above 100 while the pressure on the high side is down around 150 or lower then you have a problem with the low side being high and the high side being low. Compressor is running but not pumping freon thru sight glass. Low pressure readings decrease or a negative reading is shown.
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Expansion valve temperature sensor gas leak damaged capillary tube etc Expansion valve outlet side is chilled and low pressure side is LOW. If your still at 29 hg or very close purge the gauge. Report This by Manage My Life. If the low side is pulling a vacuum while the system is running and the high side has pressure that is normally a bad expansion valve stuck closed but it could of course be a clog in the system which is very unlikely. If youre finding that when you measure the pressure on the low side of your AC and its coming up above 100 while the pressure on the high side is down around 150 or lower then you have a problem with the low side being high and the high side being low.
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Cold plates take alot of refrigerant and you may simply be low on charge. Ive been working on a side project that I cant quite get to work. They suggested 2 possible causes. Thats a big clue. High side stays around 100 to 120 psi.
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AC low side pulls into vacuum. When a pressure gradient exists particles from a higher pressure area rush into a low pressure area. Roy You need to recover the Freon remove the low side manifold nut at the firewall and then the two bolts securing the valve to the evaporator. Pulled vacuum to almost -30 psi inches Hg observed that level held for 1 hour. At this point the system should be checked by a professional who will evacuate the system and change the drier.
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We added them into the system and found out that the high pressure side was at 130 psi and the low pressure side was pulling a vacuum of -20 psi. When this freezing occurs the low side pressure will drop eventually going into a vacuum. First if your pulling into vaccume something is wrong with your low pressure stitch what is its cut out setting. The compressor just doesnt sound right. Ok the most likely problem is that either the dryer or compressor when they failed left debris in the ac lines themselves which is causing it to go in to a vacuum evacuate the system and disassemble the lines to see if there is debris in them is so you need to blow out or replace the contaminated lines.
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Ive been working on a side project that I cant quite get to work. Im guessing there is a restrict somewhere. Get more answers from the people in your networks. Really need more info. Shut it off and low side very slowly returned to 100 after 30 minutes or so.
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Shut it off and low side very slowly returned to 100 after 30 minutes or so. My mechanic did some diagnosis today determined that at startup the high and low pressure sides of the system are OK but once the engine rises to normal operating temperature the low pressure side goes to vacuum. It is located in the evaporator housing at the evaporator. Here is a description of the expansion valve. If the low side is pulling a vacuum while the system is running and the high side has pressure that is normally a bad expansion valve stuck closed but it could of course be a clog in the system which is very unlikely.
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