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Air Conditioning Issues 02 V70XC

Help, Advice, Owners' Discussion and DIY Tutorials on Volvo's stylish, distinctive "P2" platform cars.

2001 - 2007 V70
2004 - 2007 V70 R
2001 - 2007 XC-70
2001 - 2009 S60
2003 - 2007 S60 R

jimmy57
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Year and Model: 2004 V70R GT, et al
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Re: Air Conditioning Issues 02 V70XC

Post by jimmy57 » Wed Sep 04, 2019 9:04 pm

if the clutch was an issue then the pressures on a 100F day would be 110 +/- on both gauges. If the heat removal fails due to blocked condenser air path or fan that quits then the high side goes WAY up and low side goes up some and then th ECM will cut off the compressor. The compressor stops but the gap has nothing to do with it. When you check or charge YOU MUST raie engine speed to 1200 or a little more. To not do that would be equivalent to checking how well the transmission shifts with engine only idling. Not my idea, it is the standard test conditions for all makes. SOme newer vehicles will have variable displacement compressors and would do so-so at idle but on any P2 except 3.2 6 cyl and V8 XC90s the compressor is not this type. The test condition with VD compressor is still elevated engine speed. If it quits cooling and you were never going below 35 mph then it is not fan related. That would be blocked condenser air path or possibly bad expansion valve. If the poor cooling starts with it idling or going below 20 mph then be sure the fn is still running. If the high side pressure gets to 275 and the fan is not cranked up to full jet sounding speed then there is a problem. The high side pressure will need to be read in the ECM parameters with a scan tool. The pressure there will likely be in kPa (100 kPa=14.7 psi) or bar (1 bar=14.7 psi) and you need to see if gauge pressure and scan tool pressure converted to psi are very close



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abscate
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Re: Air Conditioning Issues 02 V70XC

Post by abscate » Thu Sep 05, 2019 4:25 am

chrism wrote:
Mon Jun 17, 2019 10:06 pm
nyurch wrote:
Mon Jun 17, 2019 5:31 pm
Got a new fan off of a pristine 04 and replaced it tonight so we should see!
I'm hoping it will be the fix, I’ll update when done!
Please do let us know the results. I’m having the same problem with my 03 V70 with 240,000-ish miles. The AC will run all day long as long as I’m moving down the road or not standing still for too long. Sit in the line at a fast food joint and the compressor will stop running. Turning the AC switch on and off will alter the engine idle a bit but there won’t even be a click noise from the clutch which makes me think the problem is something other than the clutch gap. If I shut it off and run in a store for a few minutes the AC will work fine when I return. That is until I come to a stand still again.

The gauge on my cheapy refrigerant fill hose says the low pressure port pressure is right in the green zone with the compressor running at idle. I didn’t look at the gauge with RPMs elevated nor have I checked the high pressure port pressure to get an idea how well the compressor is performing.

I too am not seeing the volume of evaporator drip that I would expect in our humid climate.

A couple questions: Where is the pressure switch located and what is the allowable gap in the clutch (when disengaged).
I believe the P2 clutch gap is the Same As the P80 , viz 0.3-0.5 mm

Available Shim’s are 0.2, 0.3, and 1.0mm


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1999-V70-T5M56 2005-V70-M56 1999-S70 VW T4 BMW

chrism
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Re: Air Conditioning Issues 02 V70XC

Post by chrism » Thu Sep 05, 2019 5:51 am

Check for voltage at the compressor disconnect when the car is shut off. If there is voltage present then there must be a relay hanging up somewhere that’s draining the battery.



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