Air Conditioning blows cold air then warm air?
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    1. #1
      Junior Member
      Join Date
      May 2009
      Posts
      8

      Air Conditioning blows cold air then warm air?


      Hi Guys,

      I have a 1998 C70, and I will be driving it for 30 minutes,
      and then all of a sudden it will start blowing warm air
      and no more cold air. The outside is really sunny and hot
      in Miami where I am visiting. Any suggestions?

      It's definitely not turning off because it reached the coldest
      temp in the inside of the car... because it's very hot in Miami...

      I am clueless on this one?


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    3. #2
      Senior Member Chilled Man's Avatar
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      Jan 2007
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      13 min from Carlisle
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      16,584
      low refrigerent
      /2006 S60 T5 /K24/R Calipers/17" pegs/OBX/Koni/Eibach/JVC/SNABB/IPDSway,
      /2004 V70 R/M66 /05+ Tails/ 05+ Console/Evolve Intake/IPD Sways/OZ/Kenwood/PHUZZ
      /2005 V70XC -Stock
      Unquestionable faith is the Epitome of Ignorance. - me
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    4. #3
      Junior Member LucasC70's Avatar
      Join Date
      May 2006
      Posts
      406

      Re: (Chilled Man)

      Freon leak and/or evap busted. Common on SVC-70's. Expensive to replace too (figure at least 1200$).

      I added some freon to mine. Works for now, but refrigerant pressure is going down each week, which means I have a slow leak, probably from the evap.

      Cheapest solution, although not as "green", is to put some freon back in (12$ a bottle). Since your AC is blowing hot air, it means its empty: add the content of 2 bottles. Then monitor your AC pressure (buy a AC gauge) regularly (week to week for instance) and decide if it's worth it for you to change the evap (expensive solution).

      If you do change the evap, I recently heard of a secondary fan kit made especially for Volvo AC systems. They were optional on certain cars. A friend of mine has one on his yellow 1995 T5R. If you intend to keep the car, it might be worth it in the long run.

      Also, go on the SV-70 forum to ask about this. Same AC system.

      1998 Coral red C70 T5M - the fun summertime car
      2002 Silver V70 - the basic non-turbo winter car
      1991 Dark Gray 740T - the previous winter car
      1989 Pearl blue 780 Bertone - the collections car - RIP
      1998 Black C70 - RIP

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