Question about 1998 Volkswagen Golf

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96 golf my low side is 50psi and my high side 98-102 the a/c never gets below 70

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Ok i have seen this before the problem is very simple to fix.... There is an in line filter where the high presure line goes in to the resovor the filter is probly clogged. all you will need to di is undo the line and slide the filter out and slide in a new filter then just recharge the line and this should fix your problem

Posted on May 19, 2009


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1 Answer

What should the ac pressure (high and low) be on an 08 ford Taurus?

That varies with Ambient Temperature & Relative Humidity

70 -100 F 30-60% HI Side at 80 degrees 125 to 170 lbs
70-100 F 30-60% LO Side at 80 degrees 32 to 55 lbs

Keep in mind those pressures will cycle, as in the example

Really need a chart

I got that from my Ford Factory Workshop Manual

For --R134a Refrigerant

You only use Low Side when charging & the Hi Side
is closed,so you need to get below 40 # or you have
issues,then need to evaluate both sides

Lots to study on the internet

Sep 14, 2013 | Cars & Trucks

1 Answer

2005 GMC Sierra,4x4,5.3 flex fuel "z"code Just serviced system. Added 2 lbs 134a. still will not get below 66deg. with doors open a/c set to 60 on both sides and fan on full. Temp outside, 88....

Sounds as though ther could be too much 134 in system. I would try vacuuming system and charging again to be certain how much was in system. If you have already done this I would check for clogged orafice or obstruction. Pressures are definitely too high.

Aug 03, 2011 | GMC Sierra 1500 Cars & Trucks

1 Answer

Low side pressure specs for 2003 silverado2500hd

Ambient Air Temperature
Relative Humidity
Service Port Pressure
Maximum Left Center Discharge Air Temperature
Low Side
High Side
13-16°C (55-65°F)
150-246 kPa (22-36 psi)
730-1190 kPa (106-173 psi)
12°C (54°F)
19-24°C (66-75°F)
Below 40%
150-280 kPa (22-41 psi)
900-1390 kPa (131-202 psi)
14°C (57°F)
Above 40%
179-137 kPa (26-46 psi)
990-1500 kPa (144-218 psi)
16°C (61°F)
25-29°C (76-85°F)
Below 35%
218-328 kPa (32-48 psi)
1240-1640 kPa (180-238 psi)
17°C (63°F)
236-342 kPa (34-50 psi)
1290-1680 kPa (187-244 psi)
18°C (64°F)
Above 60%
250-365 kPa (36-53 psi)
1340-1760 kPa (194-255 psi)
20°C (68°F)
30-35°C (86-95°F)
Below 30%
266-386 kPa (39-56 psi)
1500-1940 kPa (218-282 psi)
21°C (70°F)
280-397 kPa (41-58 psi)
1540-1990 kPa (224-289 psi)
22°C (72°F)
Above 50%
300-430 kPa (44-62 psi)
1600-2070 kPa (232-300 psi)
24°C (75°F)
36-41°C (96-105°F)
Below 20%
328-439 kPa (48-64 psi)
1810-2240 kPa (263-325 psi)
25°C (77°F)
337-457 kPa (49-66 psi)
1840-2290 kPa (267-332 psi)
26°C (79°F)
Above 40%
355-474 kPa (52-69 psi)
1890-2340 kPa (274-340 psi)
27°C (81°F)
42-46°C (106-115°F)
Below 20%
391-491 kPa (57-71 psi)
2130-2500 kPa (309-363 psi)
29°C (84°F)
Above 20%
397-508 kPa (58-74 psi)
2160-2550 kPa (313-370 psi)
30°C (86°F)
47-49°C (116-120°F)
Below 30%
451-552 kPa (65-80 psi)
2420-2790 kPa (351-405 psi)
33°C (92°F)

Jul 10, 2011 | 2003 Chevrolet Silverado 2500HD

1 Answer

96 chevy blazer not blowing out cold air only 70 deg.freon full clutch engage and disengages

Have you checked the low side and high side pressures? The compressor might be bad. Does one line to the compressor get cold and the line coming out get hot?

Jul 02, 2010 | 1996 Chevrolet Blazer

2 Answers

AC not cooling for 97 Passat TDI

A/c should be charged on the low side while engine is running. Make sure high side valve is turned off. Low side reading should be around 32-35 psi at idle high side should not go above 250. I hope this helps,good luck

Aug 01, 2009 | 1999 Volkswagen Passat

1 Answer

I have a 99 chevy suburban that won't cool past 60 degrees and when idling is at 70 degrees. I have replaced the a/c compressor, orfice tube,the accumilator,rear expension valve, and fan clutch. My low...

These numbers are a little high depsite the high ambient conditions.Amazingly enough ,automotive low side suction pressure will equal the degrees its putting out at the evaporator coil...for instance,70 psi low side pressure will produce about 70 degrees of cooling. At 300 psi on the high side(which is high) this is about as low as the suction pressure will need it to go lower.I would probably be concerned with the freon level as a slight overcharge could boost these numbers.Poor air flow through the condenser can also create a higher head pressure than desired.If possible,I would evacuate and re-charge the system with the correct amount of 134a refrigerant. Try to get those pressures lower...about 250/50 would be a decent pressure value in this ambient condition.Verify good airflow through the coils and pay close attention to any foreign debris like plastic grocery bags or wrappers covering the coils...Ive even seen these make their way between the small gap between the condenser and radiator so use a light and inspect carefully for this.Air flow through that condenser coil is vital and any deficit there will create high head pressure which obviously causes high suction pressures....good luck

Jul 29, 2009 | 1999 Chevrolet Suburban

3 Answers

96 gmc jimmy a/c

The condensor (or dryer) needs to be replaced if its older and especially if the compressor has not worked is several months or more..
As a matter of fact - allot of the time whn you buy a compressor they will not waranty it unless you buy a dryer too..
Also - be sure the compressor is getting power..

Rate well ;o)

Jul 24, 2009 | 1996 GMC Jimmy

1 Answer

Air conditioning doesn't keep it cool

Your system may be low on R134a and needs to be recharged, If you did recharge it with the recharge kit and you over charged it, you'll have poor a/c performance too. The low pressure side should have 30psi to 50psi and the high pressure side should have 150psi to 200psi, any other readings will give low a/c performance and if to high of pressure can lead to system damage. Good luck and hope this helps. 

Jun 23, 2009 | 1998 Honda Accord

1 Answer

Do you have the specs for the high and low pressure readings for a 2005 Pontiac Montana?

I take it you mean the A/C pressure line. The low side should be between 30PSI to 50PSI and the high side should be between $150PSI to 200PSI. Any other readings will have poor A/C performance, and to high will result in A/C compressor damage. Good luck and hope this helps. Keep me posted be glad to help and if the low side is less then 10 PSI then the system will need to be vacuumed out due to possible moisture contamination.

Jun 23, 2009 | 2005 Pontiac Montana SV6

1 Answer

Air conditioning

It sounds like you over charged the system, the low side should be 40psi to 50psi with the A/C on high and the high pressure side should read 150psi to 200psi. Anything different, you need to get the system service and try not to use your A/C to prevent the compressor from any damages. Good luck and hope this helps.

Jun 15, 2009 | 2001 Chevrolet Silverado 2500HD

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