Pressure, Vacuum and Temperature Specifications

Pressure vs. Temperature

High Pressure Gauge:

Low Pressure Gauge:

Note:
- Pressures shown are under exact conditions (see test conditions) and are not necessarily true for every car checked.
- Ambient Temperature is given as the air surrounding the condenser and is taken 5 cm in front of the condenser.

Test Conditions
- Use a large fan to substitute for normal ram air through the condenser.
- Engine adjusted to fast idle speed.
- All conditions equivalent to 30 mph.
- Normal operating ambient temperature range is: 24 to 43° C.
- Normal operating evaporator temperature range is: -12 to 0° C.
- Under normal running conditions system pressure should be as follows:
^ low side: 15 to 30 PSIA
^ High side: 185 to 205 PSIA