Pressures and Temperatures, Checking

A/C Refrigerant System Pressures And Temperatures, Checking

The pressures and temperatures in the A/C system will vary depending on engine speed (RPM), coolant fan speed, engine coolant temperature, A/C clutch engagement, outside temperature, humidity, etc.

Pressure and temperature specifications are based on the following:

- Engine speed (RPM) at 1500
- Fresh air blower on high speed
- A/C switch adjusted to Max. cooling







1 - Evaporator
2 - Low- pressure service valve
3 - Compressor, low pressure side
4 - Compressor, high pressure side
5 - Condenser
6 - Receiver drier
7 - Sight glass
- Not applicable to all vehicles
8 - High-pressure service valve
9 - Expansion valve

Pressure and temperature specifications