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A/C not cooling. Can't add freon to my S90 S90-V90

posted by  dewfpo on  Wed Apr 21 08:29 CST 2004
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last visit: Thu Oct 23 18:34 CST 2014
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RK,

Based on your description of driving 30-40 mins and only a short cool down period (15-30 mins), I would have expected the static pressure to be higher than 85 psi. Biu I don't have a temp/psi chart.

If you consider that the compressor is sucking on one side and compressing on the other......... a low freon charge should create lower high side pressures and lower low side 'pressures'.

But I am not an expert.

To check your heater control valve, start your engine, put temp control to max heat, and check the position of the arm on the valve, now move your temp control to max cool and see if the arm has moved 90 degrees. If it hasn't, check for vacuum at the valve in both max cool and max hot positions. If no vacuum, trace your line and look for a leak. If you have vacuum and no rod movement, change out the valve.

DEWFPO
--
1998 S90 067,100 and 1995 964 150,850






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New A/C not cooling. Can't add freon to my S90 [S90-V90]
posted by  RK  on Tue Apr 20 06:21 CST 2004 >


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