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When AC goes out...

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.

1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

itsdug
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itsdug

Volvo Repair Database

Post by itsdug » Thu May 15, 2008 11:53 am

that could be it. i always thought that was an odd set up. the owners manual mentioned the light being on though. hey if it blows cold air i'm happy.

thanks again,
Doug

itsdug
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Post by itsdug » Thu May 15, 2008 4:08 pm

Ozark Lee wrote:Are you sure you are actually turning it off? On the electronic climate control unit the A/C light illuminates in the Off position rather than the On position.

...Lee
that was exactly what was wrong. thanks.

i went for a 20 minute test drive and it blew cold air the whole time. i shut the car off to run into the post office but when i came out it just blew hot air. when i returned home i shut the car off for about 5 minutes and when i restarted it i had cold air again. any suggestions?

Ozark Lee
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Ozark Lee

Post by Ozark Lee » Thu May 15, 2008 4:58 pm

Measure the A/C clutch gap with a feeler gauge set. The gap should be under 0.020. If it is larger than that the A/C clutch needs to be reshimmed. There is the really correct way to do that and then there is a real easy ghetto way of doing it.

What are your pressure readings compressor on and compressor off? You could have actually overcharged the system as well which will make the compressor run hot and then the thermal cutout will disable it until it cools again.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

itsdug
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Post by itsdug » Thu May 15, 2008 5:23 pm

with a/c on gauge was reading about 41. probably not the correct way of doing it but i got it down to exactly 35. it was blowing cold air the entire time. i shut the car off for a couple of minutes then restarted and it was blowing warm air again. with the a/c turned off the gauge was in the red.

Ozark Lee
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Ozark Lee

Post by Ozark Lee » Thu May 15, 2008 5:45 pm

41 is high for a running pressure - 35 is in the ballpark depending on the ambient temperature.

Your next check is the clutch gap.

Here is the proper way to fix it - See N8-50's .pdf file:

http://volvospeed.com/vs_forum/Ac-Therm ... 76833.html

Here is the ghetto procedure:

http://volvospeed.com/vs_forum/index.ph ... opic=80181

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

itsdug
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Post by itsdug » Thu May 15, 2008 8:58 pm

thanks again. there's not much room to move but i think i fix it.

delagarzaeric
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delagarzaeric

Recharge Problem.

Post by delagarzaeric » Thu Sep 24, 2009 9:37 pm

I'm trying to recharge my a/c but the hose will not lock on the refill fitting. Anyone else have this problem?

Ozark Lee
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Ozark Lee

Re: When AC goes out...

Post by Ozark Lee » Fri Sep 25, 2009 1:19 am

Welcome to MVS,

It is more of a hose fitting problem than a Volvo problem but yes. Pull back very hard on the female fitting collar, press the connector hard onto the male connector, and you should be able to get it to seat. You will feel the snap upon releasing the collar when it is correct.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

arsenal6
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arsenal6

Re: When AC goes out...

Post by arsenal6 » Tue May 25, 2010 1:49 pm

what brand is good for r134 or is it a generic type?

Ozark Lee
MVS Moderator
Posts: 14798
Joined: Thu Sep 07, 2006 8:24 am
Year and Model: Many Volvos
Location: USA Midwest
Has thanked: 4 times
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United States of America
Ozark Lee

Re: When AC goes out...

Post by Ozark Lee » Tue May 25, 2010 7:11 pm

It is all the same. I just buy the cheapest house brand stuff I can find from Advance or O'Reilly.

...Lee
'94 850 N/A 5 speed
'96 Platinum Edition Turbo
Previous:
1999 V70XC - Nautic Blue - Totaled while parked.
1999 V70XC - RIP - Wrecked Parts Car.
1998 S70 T5
1996 850 N/A
1989 740 GLT
1986 740 GLT
1972 142 Grand Luxe

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