What would the normal operating A/C pressure be on an '89 golf. Is it any different from the recommended pressure found on the dials of the 'do it yourself' R-134a recharge pressure gauges? I recently 'recharged' my R-134a to the instruction's spec but it doesnt blow anywhere near cold yet? Do VWs run a different 'low side' pressure than other makes? Should I add more? Thanks in advance.
A/C Pressure level on '89 Golf
Nov 09, 2003
2 Replies
The pressure depends very much on temperature. The data given in Bentley apply to R12 only, R134a operate at different pressures.
The high side pressure at 15°C should be between 9 and 11 bar. At 30°C it should be between 16 and 18.5 bar. The change with temperature is fairly linear between those temps.
Low side pressure should be between 1.2 and 1.8 bar at 15°C and between
2 and 2.75 bar at 30°C. Again, fairly linear between those temps.Above numbers are read from the graph >
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