Search found 11 matches

by Swedal
Wed Aug 01, 2018 3:25 am
Forum: Automotive Air Conditioning Forum
Topic: Can PAG and mineral coexist in old R12 system?
Replies: 0
Views: 105

Can PAG and mineral coexist in old R12 system?

I'm going to replace a condenser and drier on a Mazda MX6 1993 with R12 system. There is a sticker in german that system contains ozone harmful gas but on the other hand there is a R134 connector on the high side so I really don't know whats in the system and whats done with it. I have tired the sys...
by Swedal
Sun Jul 15, 2018 12:35 pm
Forum: Automotive Air Conditioning Forum
Topic: Berlingo Leaks on vacuum, not pressure!?
Replies: 0
Views: 94

Berlingo Leaks on vacuum, not pressure!?

This is a 2010 Citroën Berlingo with 5SEL12c compressor. It had zero pressure so I added 120 psi of nitrogen to find the leak. Not 1 psi drop for 20 mins so I began pull a vacuum. Could not get a vacuum and when isolating the vacuum pump I could see the needle return to zero. Back on with nitrogen a...
by Swedal
Wed Jun 13, 2018 4:02 pm
Forum: Automotive Air Conditioning Forum
Topic: Strange compressor behavior Volvo V50
Replies: 7
Views: 495

Re: Strange compressor behavior Volvo V50

Factory charge 520 grams. I have spoken to a guy that renovates these compressors and he explained the reason for this behavior. It's a malfunction in the internal valves. Like both suction and discharge is open at the same time and compressor just pumps internally. Replacement is only option but no...
by Swedal
Wed Jun 13, 2018 1:00 am
Forum: Automotive Air Conditioning Forum
Topic: Strange compressor behavior Volvo V50
Replies: 7
Views: 495

Re: Strange compressor behavior Volvo V50

I have removed the belly plastic to observe the clutch. I can make it spin or stop with AC button. What about bypass valves? Would I be able to see a slight change in pressures if this is faulty?
by Swedal
Tue Jun 12, 2018 4:44 pm
Forum: Automotive Air Conditioning Forum
Topic: Strange compressor behavior Volvo V50
Replies: 7
Views: 495

Re: Strange compressor behavior Volvo V50

I do a fair amount of AC work on cars. I know how many grams I put in or take out and I also know my gauges well. Did a nitrogen pressure test and gauges react as they should. Maybe it has some internal valve problem in the compressor. I will need to take it apart and actually see if it pumps at all...
by Swedal
Tue Jun 12, 2018 1:29 pm
Forum: Automotive Air Conditioning Forum
Topic: Strange compressor behavior Volvo V50
Replies: 7
Views: 495

Strange compressor behavior Volvo V50

This is a Volvo V50 that was low on refrigerant. Evacuated and tried to fill it. Compressor clutch kicks in and spins the compressor but no work is done. High and low are not moving at all. Not the slightest bit. What could be the problem here?
by Swedal
Mon Aug 21, 2017 8:15 am
Forum: Automotive Air Conditioning Forum
Topic: Low suction pressure freezing up evap on Volvo S80
Replies: 0
Views: 1776

Low suction pressure freezing up evap on Volvo S80

Trying to figure out why this Volvo S80 2003 never cuts out the AC compressor and why it has such a low suction pressure. AC works fine and cools very well but freezes up completley. I have evacuated and filled the system with 1000g R134a as label says. I suspected the evap temp sensor and removed i...
by Swedal
Sat May 27, 2017 4:06 pm
Forum: Automotive Air Conditioning Forum
Topic: High suction pressure and high head due to overfeeding expansion valve?
Replies: 2
Views: 1192

Re: High suction pressure and high head due to overfeeding expansion valve?

Thank you for helping! How can I fiddle wth the bulb on a cars expansion valve? I though everything is built into that solid block of the valve? Car is a 2003 Saab 9-5. I would really like to try manipulate the expansion valve to see if it changes.
by Swedal
Sat May 27, 2017 2:19 am
Forum: Automotive Air Conditioning Forum
Topic: Car AC open to atmosphere for 2 years
Replies: 3
Views: 1613

Re: Car AC open to atmosphere for 2 years

That's the proper way to do it but money is limited so I might try to get away with a dryer change and new refrigerant charge after some days. Is that plain stupid? Removing the compressor is alot more work but on the other hand it could kill it if I don't...
by Swedal
Sat May 27, 2017 2:13 am
Forum: Automotive Air Conditioning Forum
Topic: High suction pressure and high head due to overfeeding expansion valve?
Replies: 2
Views: 1192

High suction pressure and high head due to overfeeding expansion valve?

Did a AC job a Saab 9-5 today. Was low on ref so pulled a vacuum and weighted in the correct charge for it. Still did not work ok. Head was somewhat high at 225 psi for 75 ambient and the suction was way high at 60 psi. Fans working and condenser is clean. It's not over charged so could this be a st...

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