BOTH High and low readings should be checked to have a better idea of what is going on with an AC system but based on the limited information… the compressor is not engaged or is not pumping. Below are some things I would check;
1. Check the high and low gauge readings with the AC on & set on MAX/Recirculate, middle vents with the engine at 2,000 RPM’s, blower speed on high.
2. Check the vent temperatures with a thermometer from the middle vents, far right & far left vents?
3. What is the outside temperature at the time the readings were taken?
4. Check to see if the condenser fan blowing strong?
5. Notice if compressor clutch is cylcling excessively.
Could be overcharged, not enough air going across condenser fins, compressor not pumping sufficiently… BOTH gauge readings are really needed to get a better idea.
Below are normal car AC pressure readings with 134A.
Normal readings on high and low side with AC OFF (static pressure) – Depends on outside temperature, but normally is between 80-105 PSI
Normal low side reading with AC on high speed and MAX & engine at 800-1000 RPM’s – Ranges from 25-35 PSI
Normal high side reading ranges from 200-350 PSI
Don’t assume that if adding little Freon is good that adding a lot is better! Overcharging just a little can decrease the performance of the system and possibly damage the compressor
Thank you for using fixya and good luck, keep me posted. Be glad to help you get your A/C running again soon.
SOURCE: 2001 Saturn L200 Air conditioner issue
You need to make sure the freon is correct,by having ac gauges put on the system,if the compressor is running the gauges will tell if there is a problem with the ac system itself,now,it can be the temp door actuator motor that is in the dash,if it is not moving the temp door open,it will need to be replaced.
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