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Left and right side have 20 degree difference V70-XC70 2007

posted by  Philip on  Wed Jun 15 15:43 CST 2016
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last visit: Thu Oct 23 10:21 CST 2014
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The passenger side AC is just above 40 degrees but the drivers side is just above 60 degrees. I closed the two blend doors by hand that are controlled by the motor on the drivers side. However there is still this 20 degree difference. Do I need to tear the whole box apart to see if the doors have a small gap even when closed?

Thanks for any help.








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    Left and right side have 20 degree difference V70-XC70 2007

    posted by  james_a_sousa on  Mon Jun 27 18:59 CST 2016
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    last visit: Thu Oct 23 18:51 CST 2014
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    An AC system should be evaluated by how much the temperature is lowered from intake to discharge.

    The dscharge temperature is not a good guide - do you get the same discharge when it is 95 degrees as ween it is 75 degrees?

    You may be trying too hard.








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    Left and right side have 20 degree difference V70-XC70 2007

    posted by  KlausC on  Sat Jun 18 13:18 CST 2016
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    last visit: Fri Oct 24 10:15 CST 2014
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    Have you considered that the system is over pressurized, you did add 2 cans? Too much R134a can cause a blockage and keep the evaporator starved for gas, to say nothing about blocking the condenser.

    There is a label on the top of the strut tower which says how much R134a should be in your system.
    --
    Keeping it running is better than buying new








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      Left and right side have 20 degree difference V70-XC70 2007

      posted by  Philip on  Sat Jun 18 13:28 CST 2016
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      last visit: Thu Oct 23 10:21 CST 2014
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      Yes, I added two cans.

      I am starting over. It also had been freezing up on the highway.

      So I replaced the Expansion Valve and I will replace the pressostat and drier as soon as I figure out how much of the front of the car I need to remove to get to the drier screws. Then I will fill with three cans of r134a.

      That's my plan unless someone has a better idea.

      Thanks for the comments so far.








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    Left and right side have 20 degree difference V70-XC70 2007

    posted by  Chris Mullet on  Thu Jun 16 13:35 CST 2016
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    last visit: Fri Oct 24 09:08 CST 2014
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    My 2003 V70 started blowing warmer on one side compared to the other because of a low refrigerant charge. An evacuation and recharged fixed it.
    --
    Current rides: 2005 Volvo S80 2.5T, 2003 Volvo V70 2.4NA, 1973 Volvo 1800ES (getting ever closer to road worthiness)








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      Left and right side have 20 degree difference V70-XC70 2007

      posted by  Philip on  Fri Jun 17 17:26 CST 2016
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      last visit: Thu Oct 23 10:21 CST 2014
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      Really? How could that be?

      I have one of those endoscope cameras ordered. My latest theory is that there is something that fell down the vent and preventing the blend door from closing all the way.








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        Left and right side have 20 degree difference V70-XC70 2007

        posted by  Chris Mullet on  Sat Jun 18 13:21 CST 2016
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        last visit: Fri Oct 24 09:08 CST 2014
        [RELATED]

        You may be absolutely right about the blend door thing. All I know is that I'm not the first one here on the BB or MVS that experienced unbalanced temp due to a low charge. It must have something to do with the way the gas flows through the evaporator.

        I believe there are also situations where the controls need to be recalibrated however I'm not versed on the procedure. Maybe others have done that.
        --
        Current rides: 2005 Volvo S80 2.5T, 2003 Volvo V70 2.4NA, 1973 Volvo 1800ES (fixed the ignition - now back to the brakes again)







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