Question about 1999 Volvo V70
My 2000 S70 Works fine gdriving down the highway or at normal driving speeds. However, when i stop at a light for more then a couple of minutes the clutch disengages and will start blowing warm air. When I get back up to speed it starts cooling again. A/C is fully charged with proper pressure levels and while A/C is blowing the radiatore fan blows non-stop. Any ideas?
This is a characteristic of R-134a. The cooling efficiency at idle has improved slightly over the years with design changes to the hardware but performance still lags that of R-12.
Due to small size radiators and thus reduced coolant capacity in use in nearly all vehicles today, most manufacturers program the pcm to turn the cooling fan on when it sees an a/c "on" signal. This is to prevent overheating of your vehicle as well as keep air moving across the a/c condenser to improve cooling efficiency as much as possible.
While definitely frustrating, the symptoms you describe are not unusual.
Posted on Jun 23, 2009
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Posted on Jan 02, 2017
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